JP3154290B2 - Communication system for encoded information and method for matching encoded information - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system for encoded information and a method for matching encoded information.

More specifically, the present invention provides a method for transmitting and receiving coded information between a first communication station and a second communication station employing a predetermined coding method via an exchange transmission network. First,
Communication system comprising a code information processing device for transmitting coded information transmitted from a communication station to a second communication station between each communication station and the exchange transmission network; The present invention relates to a method for matching encoded information using a system.

[0003] More specifically, the present invention provides, for example,
A radio channel is formed between the radio base station and a plurality of radio mobile stations, a voice processing device is arranged between the communication line and the radio base station, and the radio mobile station wirelessly transfers voice information for a radio section. Depending on the station, encoding and compression are performed using a plurality of audio coding methods that are not necessarily the same, and the encoded information is transmitted to the audio processing device via the radio base station. The present invention relates to a communication system suitable for adding corresponding additional information to transmit to a voice processing device of an opposing wireless mobile station via a communication line, and a method of matching encoded information.

[0004]

2. Description of the Related Art FIG. 1 shows a general configuration of a digital mobile communication system. FIG. 1 shows a system configuration in a case where communication is performed between wireless mobile stations. Here, the voice information on the side of the radio mobile station 1 is compression-encoded for the radio section to become coded information, and the signal from the radio mobile station 1 reaches the radio base station 2 via the radio line, and the communication line 8 And a part of the decoded audio information is provided with the synchronization signal, and arrives at the exchange transmission network 4 via the communication line 9.

[0005] The encoded information transmitted to the switching transmission network 4 is:
Further, it reaches the voice processing device 5 through the communication line 10,
The radio signal is received in synchronization with the synchronization signal, further reaches the radio base station 6 through the communication line 11, reaches the radio mobile station 7 opposite to the radio mobile station 1 through the radio line, and is decoded into speech information.

In the communication system shown in FIG. 1, when the speech coding methods of the radio mobile station 1 and the radio mobile station 7 are different,
In accordance with an instruction from the exchange in the exchange transmission network 4, a speech encoding method in the speech processing device 3 and / or the speech processing device 5 is set, thereby enabling communication between the two radio mobile stations.

[0007]

However, as shown in FIG. 1, when matching cannot be made between the audio processing apparatuses due to the difference in the audio encoding method between the audio processing apparatuses, partial audio information is not obtained. , The communication quality is degraded.

In view of the above, an object of the present invention is to provide
It is an object of the present invention to provide a coded information communication system and a coded information matching method that can ensure the consistency of coded information between code information processing devices even when information coding methods are different.

[0009]

In order to achieve the above object, a communication system for coded information according to the present invention comprises a first communication station and a second communication station employing a predetermined coding system. When transmitting and receiving encoded information between the first communication station and the second communication station, the encoded information processing apparatus for transmitting the encoded information transmitted from the first communication station to the second communication station is exchanged with each other. In a communication system provided between a communication station and the switching transmission network, a first code information processing device provided on a first communication station side is provided with a second code provided on a second communication station side. A means for converting the encoded information into encoded information suitable for the second communication station when transmitting the encoded information to the information processing apparatus; When transmitting the encoded information suitable for the second communication station, the apparatus performs the conversion. It is intended to be sent along with the synchronization signal additional information indicating the expression (claim 1).

[0010] A method of matching encoded information according to the present invention is a method of exchanging encoded information between a first communication station and a second communication station employing a predetermined encoding method via an exchange transmission network. The first communication station and the switching transmission network
When transmitting coded information from the code information processing device of (1) to the second code information processing device provided between the second communication station and the switching transmission network, the code adapted to the second communication station is transmitted. When converting the encoded information to the encoded information, the first code information processing apparatus transmits the additional information indicating the conversion method together with the synchronization signal when transmitting the encoded information suitable for the second communication station. (Claim 2).

[0011]

[0012]

[0013]

[0014]

According to the first and second aspects of the present invention, when communication is performed between communication stations using different coding schemes, transmission code information can be obtained without requiring external control. Is transmitted by the encoding method of the opposite communication station, so that the code information can be surely matched.

For example, when communication is performed between mobile stations, the coded voice from the mobile stations is not converted into a PCM signal between the voice processing devices. Done. At this time, when communication is performed between mobile stations using different voice coding schemes, it is necessary for the voice processing apparatuses to match the coding information of the opposing mobile stations with the voice coding scheme of the own station. In order to solve this, by adding the information of the voice coding method of the own mobile station along with the synchronization signal at the beginning of the coded voice to be transmitted, the voice coding method of the opposite mobile station is recognized. It is possible to match with the voice coding method of the own mobile station.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As the embodiments of the present invention, the following configurations can be adopted.

(1) A plurality of communication channels are formed between a plurality of communication stations, which are not limited to one type, and a plurality of base stations, and
A plurality of transmission lines are formed between the base station and the communication line, and a code information processing device is arranged between the base station and the transmission line. The communication information is encoded according to the method, converted into code information whose contents are not necessarily the same, and transmitted to the code information processing apparatus via the base station. The code information processing apparatus adds a synchronization signal to the code information and transmits the code information to the communication line. In a communication system that transmits to the communication station via the base station in synchronization with a synchronization signal given to code information received from a communication line at the same time, the communication is performed when communication is performed between different communication stations. Based on the additional information to the synchronization signal given by the code information processing device, the coding method of the opposite communication station is recognized, and the received code information is converted into the coding method used by the communication station, Send to communication station And things (see FIGS. 2 to 4).

(2) A plurality of communication channels are formed between a plurality of communication stations and a base station which are not limited to one type, and
A plurality of transmission lines are formed between the base station and the communication line, and a code information processing device is arranged between the base station and the transmission line. The communication information is encoded according to the method, converted into code information whose contents are not necessarily the same, and transmitted to the code information processing apparatus via the base station. The code information processing apparatus adds a synchronization signal to the code information and transmits the code information to the communication line. In a communication system that transmits to the communication station via the base station in synchronization with a synchronization signal given to code information received from a communication line at the same time, the communication is performed when communication is performed between different communication stations. Based on the additional information to the synchronization signal given by the code information processing device, the coding method of the opposite communication station is recognized, and the received code information is converted into the coding method used by the communication station, Send to communication station Together, it is assumed that the transmission is converted to the encoding scheme of the communication station opposite sign information from said communication station (see FIG. 5).

Hereinafter, each embodiment described in the above (1) and (2) will be described in detail with reference to the drawings.

Embodiment 1 FIG. 2 shows a digital mobile communication system to which the present invention is applied.

In FIG. 2, when the radio mobile station 1 sends voice information to the radio mobile station 7, a call signal is transmitted to the radio base station 2, and the call signal is transmitted via the voice processing device 3. Sent to the switched transmission network 4 and by a switch in the switched transmission network 4
The transmission path of the radio base station 6 and the voice processing device 5 corresponding to the radio mobile station 7 is determined.

When a call is made between the radio mobile station 1 and the radio mobile station 7, the radio mobile station 1 encodes voice for a radio section and sends it to the radio base station 2. The wireless base station 2 receives it and sends it to the voice processing device 3. The voice processing device 3 sends the coded voice information to the exchange transmission network 4 as it is. The switching transmission network 4 sends the coded voice information to the voice processing device 5, which sends the coded voice information to the radio base station 6, and the radio base station 6 transmits the coded voice information to the radio mobile station 7.
Is sent to

This is the same when transmitting voice from the radio mobile station 7 to the radio mobile station 1. The same applies to the case where voice information is exchanged between the radio mobile station 1 and the radio mobile station 15.

Next, a case where the speech coding methods of the radio mobile station 1 and the radio mobile station 7 are different will be described below.

FIG. 3 is an explanatory diagram showing a coding method of audio information. Here, it is assumed that the audio information 18 is divided and encoded for each unit time.

When voice information is exchanged between the radio mobile station 1 and the radio mobile station 7, the voice processing device 3 adds a synchronization signal 20 and a radio signal to the coded voice information 19 received from the radio mobile station 1. The additional information 21 indicating the audio encoding method of the above is added and sent to the audio processing device 5.

FIG. 4 is a block diagram showing the structure of the voice processing apparatus 5 to the radio mobile station 7.
5 shows the change in the signal applied to. The audio processing device 5 adds the additional information 2 to the synchronization signal 20 received from the audio processing device 3.
1 recognizes the voice coding method of the wireless mobile station 1 and converts the coding information 19 received from the voice processing device 3 into the synchronization signal 2
0 in synchronization with the voice coding method of the radio mobile station 7,
It is transmitted to the wireless mobile station 7. This is the same when transmitting voice from the radio mobile station 7 to the radio mobile station 1. That is,
The voice processing device 5 adds a synchronization signal and additional information indicating the voice coding method of the radio mobile station 7 to the coded voice information received from the radio mobile station 7, and transmits the information to the voice processing device 3. The exchange of voice information between the radio mobile station 1 and the radio mobile station 15 is the same.

In the figure, the synchronization signal and the information of the speech coding system are separated, but the synchronization signal itself may have the information of the speech coding system.

The present invention can of course be applied not only to mobile communication but also to exchange of encoded information other than voice communication.

Embodiment 2 In the above-described embodiment, even when the coded voice information is transmitted from the voice processing device 5 to the voice processing device 3, the additional information indicating the voice coding method in the radio mobile station 7 is transmitted together with the synchronization signal. It was configured to transmit.

However, the audio processing device 3 is
In this case, it is possible that the synchronizing signal of the output signal cannot be recognized. In this case, code conversion is performed on the voice processing device 5 side, so that the coded voice information suitable for the wireless mobile station 1 and the voice processing device 3 It is preferable to transmit as.

FIG. 5 is an explanatory diagram showing signal processing in such a case. The configuration of the communication system used in the second embodiment is as shown in FIG.

In FIG. 2 and FIG.
Is adapted to the voice coding method of the wireless mobile station 1,
The coded voice information 28 from the radio mobile station 7 is converted, the synchronization signal 30 and additional information 31 indicating the voice coding method of the radio mobile station 1 are added, and the coded voice information is newly transmitted to the voice processing device 3. Send out.

The exchange of voice information between the radio mobile station 1 and the radio mobile station 15 is the same. However, the wireless mobile station 1
When the coded voice information is transmitted from the mobile station 7 to the wireless mobile station 7, the signal processing shown in FIGS. 3 and 4 is performed.

In the figure, the synchronization signal and the information of the speech coding system are separated, but the synchronization signal itself may have the information of the speech coding system.

The present invention can of course be applied to the exchange of coded information other than the mobile communication and the communication other than the voice communication.

[0037]

As described above, according to the present invention, when communication is performed between communication stations using different encoding schemes, communication between the communication stations is automatically performed without requiring external control. Code information can be matched.

[0038]

According to the first and second aspects of the present invention, a code information processing apparatus which cannot perform conversion of code information when communication is performed between communication stations using different coding methods. Even in the case of opposition, the transmission is performed by the encoding method of the opposing communication station, so that the code information can be matched.

[Brief description of the drawings]

FIG. 1 is a diagram showing a communication system between wireless mobile stations which is conventionally known.

FIG. 2 is a diagram showing a communication system to which the present invention is applied.

FIG. 3 is a diagram showing an operation in the first embodiment of the present invention.

FIG. 4 is a diagram showing an operation in the first embodiment of the present invention.

FIG. 5 is a diagram showing an operation in a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 radio mobile station 2 radio base station 3 voice processing device 4 switching transmission network 5 voice processing device 6 radio base station 7 radio mobile station 8 communication line 9 communication line 10 communication line 11 communication line 12 communication line 13 voice processing device 14 radio base Station 15 Wireless mobile station 16 Communication line 17 Communication line

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Jun Murase 2-10-1, Toranomon, Minato-ku, Tokyo Inside NTT Mobile Communication Network Co., Ltd. (56) References JP-A-6-46009 (JP) , A) JP-A-8-84123 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04B 14/00-14/06 H04L 7/00 H04B 7/24-7/26 H04Q 7/04-7/38

Claims (2)

(57) [Claims] When transmitting and receiving coded information between a first communication station and a second communication station employing a predetermined coding system via an exchange transmission network, the first communication station transmits and receives the coded information. In a communication system in which code information processing devices for transmitting the coded information sent from the communication station to the second communication station are provided between each communication station and the exchange transmission network, respectively. From the first code information processing device provided in
When transmitting the encoded information to the second code information processing device provided on the second communication station side, the means for converting the encoded information into the encoded information suitable for the second communication station includes the first code information. The first code information processing apparatus, when transmitting encoded information suitable for the second communication station, transmits additional information indicating the conversion method together with a synchronization signal. A communication system for encoded information, characterized in that: 2. A method according to claim 1, further comprising the steps of: transmitting and receiving encoded information between a first communication station adopting a predetermined encoding method and a second communication station via an exchange transmission network; Coded information is transmitted from a first code information processing device provided between the second communication station and the switched transmission network to a second code information processing device provided between the second communication station and the switched transmission network. When converting the encoded information into the encoded information suitable for the second communication station, the first code information processing apparatus uses the conversion method when transmitting the encoded information suitable for the second communication station. Characterized in that the additional information is transmitted together with a synchronization signal.