KR20180004075A - Method of Setting Configuration of Codec and Codec using the same - Google Patents

Abstract

The present invention relates to a codec configuration setting method and a codec applying the same. The method comprises: collecting information related to a current operating environment of a codec; and setting a configuration on quality of service (QoS) of the codec based on the collected information, thereby providing a codec configuration adaptively optimized for various service environments.

Description

[0001] The present invention relates to a codec, and more particularly,

The present invention relates to a codec, and more particularly, to a method of setting a codec configuration and a codec to which the method is applied.

A codec means a device for compressing and reproducing video, audio and audio as a combined word of an encoder and a decoder. A codec used in a computer can convert video, audio and audio data to digital for processing by a computer and reproduce the data intact on the monitor so that the user can know it.

1 is a block diagram illustrating a system including a conventional AMR (Adaptive Multi-Rate) codec.

1, a conventional system includes a Transcoding Rate and Adaptation Unit (TRAU) 11 on a network side, a base station 12, and a mobile station 13, and a Global System for Mobile Communication. GSM is a digital mobile phone system widely used in Europe and elsewhere. GSM digitizes and compresses the data, then sends it along one channel with two different user data, each of which is sent in its own time zone.

The uplink measurement unit 121 of the base station 12 measures the status of the uplink and the downlink measurement unit 131 of the terminal 13 measures the status of the downlink do. 1 as a transmission path from the terminal 13 to the base station 12 and the downlink is indicated as a transmission path from the base station 12 to the terminal 13 by a dotted arrow Respectively.

The conventional system includes source coding and channel coding based on the information on the uplink state measured by the uplink measuring unit 121 and the information on the downlink state measured by the downlink measuring unit 131, The bit rate used in channel coding can be adjusted. The coding technique in the conventional codec is divided into source coding and channel coding. Source coding is a compression technique that uses the characteristics of human sensory organs. It divides the data into human-recognizable parts and unrecognizable parts, and compresses parts that can not be recognized by humans by reducing or eliminating them. Channel coding refers to a method of adding new data to the original data so that the receiver can detect or correct an error due to noise generated in the channel in data transmission, and is also referred to as error control coding (ECC) .

In recent years, convergence in which technologies and performance have been combined into one has increased the demand for terminals having various capabilities instead of existing terminals having only one main function. Accordingly, various codecs capable of supporting various services are included in one terminal.

The quality of service (QoS) for these various services is a set of service requirements that must be met for an appropriate level of data transmission in the network. With QoS, network bandwidth can be appropriately guaranteed in real-time programs and the like, and network resources can be maintained at a certain level, thereby providing a service level similar to that of a dedicated network to a shared network.

However, as shown in FIG. 1, the conventional system has a problem that it can not be adaptively used in various service environments because it can adjust only the bit rate based on the information about the states of the uplink and the downlink.

According to an aspect of the present invention, there is provided a method of configuring a configuration of a codec suitable for a current state by adjusting QoS parameters adaptively in various service environments.

According to another aspect of the present invention, there is provided a codec in which a QoS parameter is adaptively adjusted to a variety of service environments to configure the codec according to a current state.

According to another aspect of the present invention, there is provided a method of setting a configuration of a codec, the method comprising: collecting information related to a current operating environment of the codec; And setting a QoS (Quality of Service) configuration of the codec based on the collected information.

According to another aspect of the present invention, there is provided an information processing apparatus, And setting a configuration relating to QoS (Quality of Service) of the codec based on the collected information. A computer-readable recording medium having recorded thereon a program for executing a configuration setting method of a codec, Lt; / RTI >

According to another aspect of the present invention, there is provided a method of setting a configuration of a codec, the method comprising the steps of: (a) receiving information on a terminal equipped with a codec, information on input data of the codec, Determining an initial configuration of the codec by determining an initial value of a Quality of Service (QoS) parameter based on at least one of information on the codec and information on a network to which the codec is connected; And (b) modifying the configuration of the codec by adjusting the QoS parameter adaptively to at least one of information on the terminal, information on the input data, and information on the output data, .

According to another aspect of the present invention, there is provided a wireless communication system, comprising: (a) at least one of information on a terminal equipped with a codec, information on input data of the codec, and information on output data of the codec, Determining an initial configuration of the codec by determining an initial value of a Quality of Service (QoS) parameter; And (b) modifying the configuration of the codec by adjusting the QoS parameter adaptively to at least one of information on the terminal, information on the input data, and information on the output data, The present invention is also directed to a computer-readable recording medium having recorded thereon a program for executing a method of configuring a codec,

According to another aspect of the present invention, there is provided a method of configuring a configuration of a codec, the method comprising: (a) receiving information on a terminal equipped with a codec, information on input data of the codec, Determining an initial value of a Quality of Service (QoS) parameter based on at least one of information on the codec; And (b) modifying the configuration of the codec by adjusting the QoS parameter adaptively to at least one of the information on the terminal, the information on the input data, and the information on the output data.

According to another aspect of the present invention, there is provided an apparatus and method for providing a quality of service (QoS) parameter based on at least one of information on a terminal equipped with a codec, information on input data of the codec, Determining an initial configuration of the codec by determining a value; And (b) modifying the configuration of the codec by adjusting the QoS parameter adaptively to at least one of a change of at least one of information on the terminal, information on the input data, and information on the output data. The present invention is achieved by a computer-readable recording medium having recorded thereon a program for executing a configuration setting method of the present invention.

According to another aspect of the present invention, there is provided a codec comprising: a configuration setting unit configured to set a quality of service (QoS) of a codec based on information related to a current operating environment of the codec; A source encoding unit encoding the first data according to the set configuration; And a source decoding unit decoding the second data according to the set configuration.

According to the present invention, by collecting information related to the current operating environment of a codec and setting a QoS (Quality of Service) configuration of the codec based on the collected information, a codec optimized adaptively to various service environments Lt; RTI ID = 0.0 >

In addition, according to the present invention, it is possible to have a configuration of a codec optimized for information on a terminal, information on input data of a codec, information on output data of a codec, and information on a network, It is possible to provide data of a desired format in the service area, thereby improving the service efficiency.

1 is a block diagram illustrating a system including a conventional AMR (Adaptive Multi-Rate) codec.
2 is a block diagram schematically illustrating a process of resetting the configuration of a codec according to an embodiment of the present invention.
Figure 3 is a block diagram illustrating a system including the reconfigurable codec of Figure 2;
4 is a block diagram specifically illustrating a reconfigurable codec included in FIG.
5 is a flowchart illustrating a method of setting a configuration of a codec according to an embodiment of the present invention.
6 is a flowchart illustrating a method of setting a configuration of a codec according to another embodiment of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Similar reference numerals have been used for the components in describing each drawing.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

2 is a block diagram schematically illustrating a process of resetting the configuration of a codec according to an embodiment of the present invention. In Fig. 2, arrows indicated by dashed lines represent control signals, and arrows indicated by solid lines represent data.

Referring to FIG. 2, the initial codec setting unit 21 includes a terminal mode (TMi) information, a network mode (NMi) information on a network to which data is transmitted, Based on the input mode (IM) information, which is information on the input data of the codec, and the initial value of the output mode (OMi) information, which is information on the output data of the codec, 20 are set.

The codec setting change unit 22 changes the codec setting based on the current information on the terminal mode TMc information, the network mode NMc information, the input mode IMc information and the output mode OMc information, 20) is reset.

The codec 21 receives at least one of the terminal mode information, the network mode information, the input mode information, and the output mode information to set the initial configuration of the codec, and the terminal mode information, the network mode information, the input mode information, And re-configures the codec by receiving a real-time value for at least one of the information.

Here, the configuration refers to a state in which an information processing system or a network is organized according to the number, properties, interconnection, and basic characteristics of the functional units, or a state in which such a system is organized. . ≪ / RTI >

The configuration of the codec can be variously set by controlling a QoS parameter. QoS parameters include quality, bit rate, complexity, delay, the amount of bits allocated to error protection, an encoding mode, an encoding channel, A decoding channel, a frame size, and the like. In order to reconfigure the codec configuration by controlling the QoS parameters, a monitoring technology for measuring the performance and service status of the network is required. In this case, the required QoS monitoring is to measure and analyze the quality of the service provided by the network effectively to satisfy the requirements. The results of such monitoring can be fed back and used as data to change settings of existing networks and the like.

Quality means sound quality or picture quality at the same bit rate, and the higher the quality, the better the performance of the codec. The bit rate means the transmission rate of the media signal, that is, the amount of data used when encoding the media signal. The higher the bit rate, the better the quality but the capacity increases. Here, the media signal includes audio, music, video signals, and the like. The complexity means the complexity of the algorithm, and the lower the complexity, the better the performance of the codec. The delay means the delay of the media signal on the network, and the lower the delay, the better the performance of the codec. The amount of bits allocated to error prevention means the amount of additional data inserted to prevent an error, specifically, the amount of additional data to be inserted is changed according to the importance of data. The encoding mode can be divided into speech or music depending on the source of the input signal. The encoding channel and the decryption channel represent the number of channels for which encoding and decoding are respectively performed.

Table 1 relates to a method for resetting the configuration of the codec according to the terminal mode, Table 2 relates to a method for resetting the configuration of the codec according to the network mode, and Table 3 shows a method for resetting the configuration of the codec according to the input mode And Table 4 relates to a method of resetting the configuration of the codec according to the output mode.

Hereinafter, the operation of resetting the information on the terminal mode, the network mode, the input mode and the output mode, and the configuration of the codec accordingly will be described with reference to Tables 1 to 4.

When to set Setting information
category Setting information Codec Settings Quality Rate Complexity Initial setting Terminal type wireless Medium NA Low cable High NA High Battery status High NA NA High Medium NA NA Medium Low NA NA Low User settings Quality
High to Low High to Low NA NA Rate
High to Low NA High to Low NA Complexity
High to Low NA NA High to Low reset Battery status High NA NA High Medium NA NA Medium Low NA NA Low

Referring to Table 1, the terminal mode can be divided into an initial setting step and a resetting step according to the timing of setting the codec configuration. The initial setting step may be a step in which the codec starts the service, and the reset step may be a step in which a predetermined time has elapsed since the codec started the service.

The configuration of the codec can be set by determining a QoS parameter. At this time, QoS parameters determined based on the terminal mode include quality, bit rate, and complexity. Hereinafter, an operation for resetting the configuration of the codec by adjusting the QoS parameters according to the setting time and the setting information will be described.

In the initial setting step, the codec configuration can be set based on the type of the terminal, the battery status, and the user setting information.

The form of the terminal can be divided into a hand-held device and a fixed device depending on the type of power supply. In the case of a wireless terminal, since the power source is not continuously supplied, the battery state is variable and transmission delay may occur. Therefore, the quality can be set to a medium level and the complexity can be set lower than a predetermined threshold value. In the case of the wired terminal, since the power is continuously supplied and stable, the quality can be set higher than the predetermined threshold value and the complexity can be set higher than the predetermined threshold value. In this case, the form of the terminal does not affect the bit rate (NA, not applicable).

The state of the battery does not need to be considered in the case of the wired terminal, but in the case of the wireless terminal, the state of the battery is variable, which greatly affects the configuration of the codec. The state of the battery can be divided into three levels by quantifying the amount available. When the remaining amount of the battery is sufficient, that is, when the state of the battery is higher than the predetermined threshold value, the complexity is set to be high, and the algorithm whose complexity is higher than the predetermined threshold value can be activated. If the battery condition is normal, the complexity can be set to normal. When the battery remaining amount is insufficient, that is, when the state of the battery is lower than the predetermined threshold value, the complexity is set low, and the algorithm whose complexity is lower than the predetermined threshold value can be activated. In this case, the state of the battery does not affect the quality and bit rate.

The user setting means a configuration of a codec determined by the user in advance regarding the quality, bit rate, and complexity of the codec, and does not affect the bit rate and the complexity when the user sets the quality. If the user sets the bit rate, And complexity, and does not affect the quality and bit rate when the user sets the complexity.

In the resetting step, the configuration of the codec can be reset based on the state of the battery or the like. The terminal type does not change, so there is no need to consider when re-configuring the codec. Also, since the power of the wired terminal is constantly supplied, there is no change in the state of the battery. Therefore, only the wireless terminal can reset the configuration of the codec according to the state of the battery.

In the resetting step, as in the initial setting of the codec, when the remaining amount of the battery is higher than the predetermined threshold value, the complexity is set high and the algorithm whose complexity is higher than the predetermined threshold value can be activated. If the remaining battery level is normal, the complexity can be set to normal. When the remaining amount of the battery is lower than the predetermined threshold value, the complexity is also set low and the algorithm whose complexity is lower than the predetermined threshold value can be activated. In this case, the battery condition does not affect the quality and bit rate.

When to set Setting information
category Setting information Codec Settings Quality Rate Delay Error Protection Early service
Kinds Communication Medium Low Short High streaming Medium High Long Low broadcast High High Medium High Used
network Mobile Network Medium Low Short High PSTN Medium Low Medium Low IP High High Short High Now Error rate High NA NA NA High Low NA NA NA Low Bandwidth High NA High NA NA Low NA Low NA NA

Referring to Table 2, the network mode can be divided into an initial setting step and a resetting step according to the timing of setting the codec configuration. The initial setting step may be a step in which the codec starts the service, and the reset step may be a step in which a predetermined time has elapsed since the codec started the service.

The configuration of the codec can be set by determining the QoS parameters. At this time, QoS parameters determined based on the network mode are assigned to Quality, Bit Rate, Delay, and Error Protection And the amount of bits to be written. Hereinafter, an operation of determining a QoS parameter according to a setting time and setting information will be described.

In the initial setting step, the codec configuration can be set based on the type of service, the type of network to be used, and the like.

The type of service is a content service that provides input data of a codec and can be divided into communications, streaming, and broadcasting. Examples of communication services include telephones and messengers that are served in real time. Since it is important to reduce the delay in the communication service provided in real time, it is important to set the delay to be shorter than the predetermined threshold value, to set the quality to a medium value, to set the bit rate to be lower than the predetermined threshold value, The bit amount can be set to be higher than a predetermined threshold value. A streaming service is, for example, UCC (User Created Contents) that is recently actively used to reproduce a voice or image in real time on the Internet without storing a media signal on a hard disk. Such a streaming service may be set to a medium quality, a bit rate may be set higher than a predetermined threshold value, a delay may be set to be longer than a predetermined threshold value, and an amount of bits allocated to error prevention may be set lower than a predetermined threshold value. The quality of the broadcast and the bit rate should be set higher than a predetermined threshold, the delay is set to be normal, and the amount of bits allocated to error prevention may be set higher than a predetermined threshold have.

The types of networks to be used can be classified into a mobile network, a public switched telephone network (PSTN), and an Internet Protocol (IP). The mobile network means a network between the terminal and the base station, the quality is set to a medium level, the bit rate is set to be lower than a predetermined threshold value, the delay is set to be shorter than a predetermined threshold value, Can be set to be higher than the threshold value. The PSTN means a public switched telephone network operated by a public telecommunication carrier. The quality is set to a medium level, the bit rate is set lower than a predetermined threshold, the delay is set to a medium level, Value. IP refers to a protocol used to send data from one computer to another computer on the Internet. The quality and the bit rate are set to be higher than a predetermined threshold value, the delay is set to be shorter than a predetermined threshold value, The amount can be set to be higher than a predetermined threshold value.

In the resetting step, the configuration of the codec can be reset based on the error rate and bandwidth of the network.

The error rate is divided into two stages by quantifying errors occurring in the current network. If the error rate is higher than the predetermined threshold value, the amount of bits allocated to the error prevention is set to be higher than the predetermined threshold value. If the error rate is lower than the predetermined threshold value, Can be set low.

Bandwidth is divided into two levels by quantifying the amount of bandwidth available in the current network. If the bandwidth is greater than a predetermined threshold value, the bit rate may be set higher than a predetermined threshold value, and if the bandwidth is smaller than the predetermined threshold value, the bit rate may be set lower than a predetermined threshold value.

When to set Setting information
category Setting information Codec Settings Encoding mode Encoding channel Early Number of channels One NA One 2 NA 2 3 or more NA 3 or more sauce Speech Speech NA music music NA Now Current channel One NA One 2 NA 2 3 or more NA 3 or more Current source Speech Speech NA music music NA

Referring to Table 3, the input mode can be divided into an initial setting step and a resetting step according to the timing of setting the codec configuration. The initial setting step may be a step in which the codec starts the service, and the reset step may be a step after a predetermined time has elapsed since the codec starts the service.

The configuration of the codec can be set by determining a QoS adjustment factor. In this case, the QoS adjustment factors determined based on the input mode include an encoding mode and an encoding channel. Hereinafter, an operation of determining a QoS adjustment factor according to a setting time and setting information will be described.

In the initial setting step, the codec configuration can be set based on the number of channels and the source mode.

The number of channels can be from one to N, where N is a natural number. If the number of channels is one (mono), the number of encoding channels is also set to one. If the number of channels is two, the number of encoding channels is also set to two. If the number of channels is three or more, Or more. In this case, the encoding mode is not affected by the change in the number of channels.

The source mode can be divided into speech or music. If the media signal is audio, the encoding mode is set to the audio mode, and if the media signal is music, the encoding mode can also be set to the music mode. In this case, the encoding channel is not affected by the type of the source mode.

In the resetting step, the configuration of the codec can be reset based on the current number of channels and the current source mode.

The number of current channels may be from one to N, where N is a natural number. If the number of channels is one (mono), the number of encoding channels is also set to one. If the number of channels is two, the number of encoding channels is also set to two. If the number of channels is three or more, Or more. In this case, the encoding mode is not affected by the change in the number of channels.

The current source mode can be divided into speech or music. If the media signal is audio, the encoding mode is set to the audio mode. If the media signal is music, the encoding mode can also be set to the music mode. In this case, the encoding channel is not affected by the type of the source mode.

When to set Setting information
category Setting information Codec Settings Quality Encoding channel Early Number of output channels One NA One 2 NA 2 3 or more NA 3 or more Output device Earphone / Handset Medium One Headset High 2 Loud Speaker High 1 ~ 3 or more Now Current output
Number of channels One NA One 2 NA 2 3 or more NA 3 or more Current output device Earphone / Handset Medium One Headset High 2 Loud Speaker High 1 ~ 3 or more

Referring to Table 4, the output mode can be divided into an initial setting step and a resetting step, depending on when the codec configuration is set. The initial setting step may be a step in which the codec starts the service, and the reset step may be a step after a predetermined time has elapsed since the codec starts the service.

The configuration of the codec can be set by determining a QoS adjustment factor. In this case, QoS adjustment factors determined based on the output mode include a quality and a decoding channel. Hereinafter, an operation of determining a QoS adjustment factor according to a setting time and setting information will be described.

In the initial setting step, the configuration of the codec can be set based on the number of output channels and the output device.

The number of output channels may be from one to N, where N is a natural number. If the number of channels is one (mono), the decoding channel is also set to one. If the number of channels is two (stereo), the decoding channel is also set to two. If the number of channels is three or more, Or more. In this case, the quality is not affected by changes in the number of channels.

The output device can be divided into earphone / handset, headset and loudspeaker depending on the number of output terminals. In case of one output terminal such as earphone or handset, quality can be set to normal and decryption channel can be set to one. In case of two output terminals like headset, quality can be set high and decode channel can be set to two. When there are a plurality of output terminals such as a loudspeaker, the quality can be set high, and the decoded channel can be set to one to three or more.

In the resetting step, the configuration of the codec can be reset based on the number of the current output channels and the current output device.

If the current output channel number is one (mono), the decoding channel is also set to one, and if the number of channels is two (stereo), the decoding channel is also set to two. If the number of channels is three or more, Can be set to three or more. In this case, the quality is not affected by changes in the number of channels.

The current output device can be divided into earphone / handset, headset and loudspeaker according to the number of output terminals. In case of one output terminal such as earphone or handset, quality can be set to normal and decryption channel can be set to one. In case of two output terminals like headset, quality can be set high and decode channel can be set to two. When there are a plurality of output terminals such as a loudspeaker, the quality can be set high, and the decoded channel can be set to one to three or more.

Figure 3 is a block diagram illustrating a system including the reconfigurable codec of Figure 2;

Referring to FIG. 3, the system includes a terminal (Mobile Station) 31 and a base station (Base Station) 32. The terminal 31 includes a reconfigurable codec 311, a channel encoding / decoding unit 312, a modulation / demodulation unit 313, and an RF front- end, 314). The base station 32 includes an uplink measuring unit 321 and a network control unit 322.

The reconfigurable codec 311 performs encoding and decoding on the media signal, and specifically performs analog / digital conversion and compression on the media signal. Here, the media signal includes audio, music, video signals, and the like. A reconfigurable codec 311 according to an exemplary embodiment of the present invention includes an Input Mode Information Providing Unit 315, a Terminal Mode Information Providing Unit 316, Information from at least one of an OM (Output Mode Information Providing Unit) 317 and a Network Mode Information Providing Unit (NM) 318. The reconfigurable codec 311 adjusts the QoS parameters based on the received information and resets the configuration according to the adjusted QoS parameters. The process of adjusting the QoS parameters based on the information received from the respective information providing units 315, 316, 317, and 318 has been described with reference to FIG. 2, so detailed description thereof will be omitted.

The channel encoding / decoding unit 312 adds bits to the input media signal during transmission and storage of the media signal, that is, to detect or correct an error with respect to noise generated in the communication channel. At this time, the added bit is referred to as redundancy, and the receiving side controls the error using the redundancy. In addition, the channel encoding / decoding unit 312 restores data damaged by channel noise.

The demodulator / demodulator 313 converts a media signal into a signal suitable for transmission to a communication line. Specifically, the demodulator / demodulator 313 modulates a media signal on a carrier wave. Here, the carrier wave refers to a sine wave or a pulse wave that transmits information in wireless communication. Further, the demodulator / demodulator 313 receives the modulated carrier wave and removes the carrier component from the received modulated carrier wave to perform demodulation to obtain a voice signal, that is, to generate an original signal from the modulated signal.

The RF front end unit 314 preprocesses the media signal downlinked from the antenna and provides it to the demodulator / demodulator 313. The signal output from the demodulator / demodulator 313 is transmitted to the base station through the antenna via the antenna do.

The uplink measurement section 321 included in the base station 32 measures the state of the uplink, specifically, the quality of the uplink. The network control unit 322 provides information on the network to the network information providing unit 318 of the terminal based on the state of the network and the quality of the uplink measured by the uplink measuring unit 321. [

4 is a block diagram specifically illustrating a reconfigurable codec included in FIG.

Referring to FIG. 4, the reconfigurable codec 40 includes a mode information analysis unit 41, a configuration setting unit 42, a source encoder 43, An Error Protection Unit 44, a Multiplexing Unit 45, a Source Decoder 46, an Error Protection Decoding / Concealment Unit 47, and a Demultiplexing Unit , 48).

The mode information analyzing unit 41 receives at least one of the terminal mode information TM, the network mode information NM, the input mode information IM and the output mode information OM, Analyze the information.

The configuration setting unit 42 adjusts the QoS parameters of the codec based on the information analyzed by the mode information analyzing unit 41 and controls the source coding unit 43, the error preventing unit 44, And sets the configuration of at least one of the decoding unit 46 and the error-preventing decoding / concealing unit 47. The detailed setting method has been described above with reference to FIG. 2, so that a detailed description thereof will be omitted.

The source coding unit 43 receives the input signal IN, converts it to digital, and compresses it. At this time, the configuration of the source coding unit 43 can be reset based on the first control signal CS1 (control signal) provided from the configuration setting unit 42. [ For example, when the configuration setting unit 42 sets the encoding mode to the audio mode or the music mode on the basis of the input mode information IM, the source encoding unit 43 sets the audio mode or the music mode And performs encoding.

The error prevention unit 44 adds a parity bit to the output of the source encoding unit 43 to prevent an error when a signal is transmitted through the channel. Here, the parity bit means a bit appended to the original information to check whether an error has occurred in the process of transmitting the information. In particular, the parity bit may be appended to the end of the byte such that the number of bits in 1 is always even or odd, depending on the logical structure of the system. At this time, the configuration of the error preventing unit 44 can be reset based on the second control signal CS2 provided from the configuration setting unit 42. [ For example, when the configuration setting unit 42 sets the amount of bits allocated to the error prevention to be high or low based on the network mode information NM, the error prevention unit 44 sets the parity bit Can be changed.

The multiplexing unit 45 generates a bit stream from the output of the error preventing unit 44, and transmits the generated bit stream to the corresponding channel. The demultiplexer 48 demultiplexes the bit stream transmitted from the channel.

The error preventive decoding / concealing unit 47 receives the output of the demultiplexing unit 48 and conceals the damaged data using the spatial / temporal redundancy of the normally received data. Specifically, the error preventing decoding / concealing unit 47 repeats the spectrum of the previous normal frame to restore a frame in which an error has occurred, an error is generated by interpolating the spectrum of the previous normal frame and the next normal frame The error can be concealed by using an interpolation method for restoring the frame. At this time, the configuration of the error-prevention decoding / concealing unit 47 can be reset based on the third control signal CS3 supplied from the configuration setting unit 42. [ For example, when the configuration setting section 42 sets the amount of bits allocated to the error prevention to be high or low based on the network mode information NM, the error preventing decoding / An iterative method or an interpolation method can be applied.

The source decoding unit 46 receives the output of the error prevention decoding / concealing unit 47 and decodes it, that is, converts it into an analog signal to generate an output signal OUT. At this time, the configuration of the source decoding unit 46 can be reset based on the fourth control signal CS4 received from the configuration setting unit 42. [ For example, when the configuration setting unit 42 sets the decoding mode to the audio mode or the music mode based on the output mode information OM, the source decoding unit 46 sets the decoding mode to the audio mode or the music mode Decryption.

5 is a flowchart illustrating a method of setting a configuration of a codec according to an embodiment of the present invention.

Referring to FIG. 5, a method of configuring a codec according to an exemplary embodiment of the present invention includes steps of processing the codec shown in FIG. 4 in a time-series manner. Therefore, even if omitted below, the contents described above with respect to the codec shown in FIG. 4 also apply to the method of setting the configuration of the codec according to the present embodiment.

In step 51, the configuration setting unit 42 sets the initial value of the QoS parameter based on at least one of the information on the terminal including the codec, information on the input data of the codec, and information on the output data of the codec, To determine the initial configuration of the codec.

In step 52, the configuration setting unit 42 adaptively adjusts the QoS parameter to at least one of the information on the terminal, the information on the input data, and the information on the output data, do.

6 is a flowchart illustrating a method of setting a configuration of a codec according to another embodiment of the present invention.

Referring to FIG. 6, a method of configuring a codec according to an embodiment of the present invention includes steps of processing the codec shown in FIG. 4 in a time-series manner. Therefore, even if omitted below, the contents described above with respect to the codec shown in FIG. 4 also apply to the method of setting the configuration of the codec according to the present embodiment.

In step 61, the mode information analyzing unit 41 collects information related to the current operating environment of the codec. Here, the information may include at least one of information on the terminal equipped with the codec, information on the input data of the codec, information on the output data of the codec, and information on the network connected to the codec.

In step 62, the configuration setting unit 42 sets a QoS (Quality of Service) configuration based on the collected information.

Specifically, if the collected information relates to at least one of a type and a state of a power supply of a terminal equipped with a codec, the configuration setting unit 42 sets at least two different Any one of the algorithms with complexity can be selected.

The configuration setting unit 42 determines the number of channels to be encoded according to the number of channels of the input data if the collected information is related to at least one of the number of channels of the input data of the codec and the type of the source, The encoding mode can be determined as either a source or a music depending on whether the source of the data is speech or music.

The configuration setting unit 42 determines the number of channels to be decoded according to the number of channels of the output data if the collected information relates to at least one of the number of channels of the output data of the codec and the number of output terminals, It is possible to determine the quality of the output data and the number of channels to be decoded in proportion to the number of output terminals of the output data.

If the collected information relates to at least one of the type of content service providing the input data of the codec, the type and bandwidth of the network connected to the codec, and the error rate, the configuration setting unit 42 may set the type of content service, The bit rate, the delay, and the bit amount allocated to the error prevention in accordance with at least one of the type, the type, the bandwidth, and the error rate.

It is needless to say that the present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art within the scope of the present invention.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, hard disk, floppy disk, flash memory, optical data storage, And the like. The computer readable recording medium may also be distributed over a networked computer system and stored and executed as computer readable code in a distributed manner.

20 ... codec 21 ... initial codec setting unit
22 ... codec setting change section

Claims (1)

A configuration setting unit for receiving information related to a current operating environment in a terminal and changing a configuration related to a quality of service of a codec built in the terminal based on information related to the received current operating environment; And
And an encoding unit encoding the input data based on the changed configuration,
Wherein the configuration unit sets different error control processes corresponding to error rates of the network and a reference value when encoding the input data in the encoding unit when the information related to the current operation environment is related to an error rate of the network, To change the configuration.

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