KR100300984B1 - Apparatus for writing/playback of optical disk written with multi-language audio signals and method thereof - Google Patents

Abstract

PURPOSE: An apparatus for writing/playback of an optical disk and a method thereof are provided to substantially play the contents of a service offered by a broadcast program by recording audio signals in two languages and enabling a user to select a desired language for playing the contents. CONSTITUTION: An apparatus for writing/playback of an optical disk written with two-language audio signals comprises an audio/video CODEC(Coder and Decoder)(10) for compressing two-language audio signals and video signals inputted from the outside during writing and extending the compressed signals during playback, a channel CODEC(12) for converting the compressed audio/video signals into a writing format during writing and into a playback format during playback, an RF(Radio Frequency) amplifying unit(14) for converting an input electrical signal into an optical signal during writing and converting an optical signal into an electrical signal during playback, a pickup unit(16) for writing an optical signal and an electrical signal on a disk and regenerating the signals, a servo unit(18) for operating the pickup unit by receiving information needed for servo control from the channel CODEC and the output signal of the RF amplifying unit, and a system control unit(20) for managing all data during writing/playback and interfacing with a user.

Description

Recording / playback apparatus for optical discs capable of recording / reproducing bilingual audio signals, and recording / playback methods thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording / reproducing apparatus for audio / video, and more particularly, to an audio / video signal of two languages transmitted from a television broadcasting station, through a digital compressor method, and capable of re-recording. An optical disc recording / reproducing apparatus for audio / video.

In the case of analog television broadcasting, audio signals of up to two languages consisting of a main language and a sub-language can be transmitted according to a program along with a video signal. At this time, the main language is transmitted through the main language audio band according to the television broadcasting standard, and the sub-language is transmitted through the sub-language audio band.

Therefore, when watching an analog television broadcast composed of a bilingual audio signal program on a television receiver, a single audio signal can be outputted through the selection of a main language or a sub-language, or two languages can be simultaneously displayed according to the specifications of the television receiver. You can print

But. When recording such a broadcast signal to a video recording / reproducing apparatus such as a video cassette recorder (VTR), only the audio signal of the main language transmitted in the audio band of the television broadcasting standard is recorded together with the video signal among the two language audio signals transmitted. Have no choice but to.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a recording / reproducing apparatus for an audio / video optical disc capable of recording and re-recording an audio signal and a video signal of two languages transmitted from a television broadcasting station through a digital compressor method. The second object is to provide a method for recording audio signals of two countries according to the first object, and the third object is to provide a method for reproducing audio signals of two countries according to the first object.

1 is a block diagram of a recording / reproducing apparatus of an audio / video optical disc according to the present invention.

2 is a diagram showing the data configuration of an information file according to the present invention.

3A and 3B are diagrams illustrating the configuration of stream IDs allocated to the main language and the sub-language according to the compression method of the audio data shown in FIG. 2.

FIG. 4 is a detailed configuration diagram of the audio / video codec unit shown in FIG. 1.

5 is a flowchart illustrating a method for recording a bilingual language according to the present invention.

6 is a flow chart illustrating a method for selecting a bilingual language recorded in accordance with the present invention.

An optical disc recording / reproducing apparatus capable of recording / reproducing bilingual audio signals according to the present invention for achieving the first object

An audio / video codec unit (CODEC) for compressing audio and video signals of two countries input from the outside during recording, and for expanding the compressed signal during playback; A channel codec unit for converting a compressed audio / video signal to a recording format during recording and for converting to a playback format during playback; An RF amplifier for converting an electrical signal input during recording into an optical signal and converting the optical signal into an electrical signal during reproduction; A pickup unit for recording and reproducing the optical signal and the electrical signal on a disc; A servo unit receiving the output signal of the RF amplifier and information necessary for servo control from a channel codec unit to perform an operation of the pickup unit; And a system controller for managing and controlling all data during recording / reproducing and interfacing with a user.

In this case, the input data from the outside may include an attribute file of an audio / video file (A / V file), an audio / video file (A / V file), and an information file for random search. .

The information file is characterized by including an area indicating whether audio signals of two countries are recorded, and an area capable of designating an attribute of an audio signal of an assigned stream ID of a primary language and a secondary language.

In the optical / video optical disc recording and reproducing apparatus according to the present invention for achieving the second object, a method for recording an audio signal of two countries transmitted from a broadcasting station is provided.

Determining the number of transmission languages of the audio signal transmitted from the broadcasting station; Setting a multi-language audio flag in the information file if the number of determined transmission languages is composed of a main language and a sub-language; Recording the stream ID set in the information file by setting the stream IDs of the main language and the sub-language according to an audio signal compression method; Band-compressing the input video signal and the two audio signals according to a predetermined compression scheme; And multiplexing the compressed one video bitstream and two audio bitstreams.

In the optical / video optical disc recording / reproducing apparatus for audio / video according to the present invention for achieving the third object, the method for reproducing audio signals recorded in two countries

Checking the multi-language audio flag recorded in the information file of the audio / video data to determine whether the flag is set; If the flag is set, informing the user of the facts of recording the main language and the sub-language; And checking the stream ID of the language selected by the user, separating only the selected stream from the composite signal, decoding the audio, and playing the audio.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

1 is a block diagram of a recording / reproducing apparatus of an audio / video optical disc according to the present invention.

The apparatus shown in FIG. 1 includes an audio / video codec unit 10, a channel codec unit 12, an RF amplifier unit 14, a pickup unit 16, a servo unit 18, and a system control unit 20. Is made of. Here, the codec unit is an abbreviation of an encoder and a decoder, and operates as an encoder at the time of recording and a decoder at the time of reproduction.

The audio / video codec unit 10 is a means for compressing audio and video signals from two countries input from the outside during recording, and extending the audio and video signals from the two countries compressed during playback.

The channel codec unit 12 is a means for converting the compressed audio / video signal to a recording format during recording and for converting to a playback format during playback.

The RF amplifier 14 is a means for converting an electrical signal input at the time of recording into an optical signal and an optical signal at the time of reproduction.

The pickup section 16 is a means for recording and reproducing the optical and electrical signals on a disc.

The servo unit 18 is a means for controlling the operation of the pickup unit 16 by receiving the output signal of the RF amplifier unit 14 and information necessary for servo control from the channel codec unit 12.

The system control unit 20 is a means for managing and controlling all data during recording / reproducing and for interfacing with a user.

Since the operation at the time of reproduction performs the reverse operation at the time of recording, the configuration and operation of the apparatus shown in FIG. 1 will be described with reference to the operation at the time of recording.

The audio / video encoder 10 compresses data from an external audio / video signal through a compression scheme such as an amplifier (MPEG) and AC3. That is, the video signal is compressed by the MPEG method, and the audio signal is compressed by the MPEG or AC3 method. The data input here includes an attribute of an audio / video file (A / V file) and an audio / video file (A / V file) and an information file for random search.

The channel encoder 12 converts the output of the audio / video encoder 10 into a format suitable for recording on a disc through error correction (ECC) and modulation.

The RF amplifier 14 receives the output from the channel encoder 12 and converts the electrical signal into an optical signal.

The servo unit 18 receives the output signal of the RF amplifying unit 14 and information necessary for servo control from the channel encoder 12 and controls the operation of the optical pickup.

The pickup unit 16 records an optical signal output from the RF amplifier unit 14 on a disc and includes an actuator for performing focusing and tracking operations.

The system controller 20 manages and controls all data and interfaces with the user during recording / reproducing.

2 is a diagram showing the data configuration of an information file according to the present invention.

According to the configuration of the information file shown in Fig. 2, the information file system includes a video title information management area 20, a program information management area 22, a cell information management area 24, and other information management areas 26. The video title property is designated by the video title information management area 20.

Looking at the properties of the video titles that can be specified, the video coding mode area for specifying whether the compression method of the video signal is MPEG1 or MPEG2, and the television broadcast method discrimination for specifying whether the television broadcast method is NTSC or PAL method. The mode area, the display mode area for specifying whether the aspect ratio is 4: 3 or 16: 9, the multi-language audio flag area for specifying whether audio signals are recorded in the main language and the sub-language, and the audio coding method is MPEG And an audio coding mode area for designating whether it is an AC3 system, a main language stream ID recording area for recording a main language stream ID and a sublanguage stream ID, a recording area for a sublanguage stream ID, and the like.

Therefore, as shown in Fig. 2, the characteristics of the A / V data, such as the compression method of the audio signal during recording / reproduction, the presence or absence of audio data in two languages, and the assigned stream IDs of the main language and the sub-language, etc. In this case, the user can select and play a desired language from the recorded audio signals of the bilingual through the interface during playback.

3A and 3B are diagrams illustrating the configuration of stream IDs allocated to the main language and the sub-language according to the compression method of the audio data shown in FIG. 2.

FIG. 3A shows a configuration for displaying the stream ID of the audio signal by the MPEG method, and FIG. 3B shows a configuration for displaying the stream ID of the audio signal by the AC3 method.

4 is a detailed configuration diagram of the audio / video codec unit shown in FIG. 1, where reference numeral 10a represents a detailed configuration diagram of an audio / video encoder, and reference numeral 10b represents a detailed configuration diagram of an audio / video decoder.

First, the configuration of the audio / video encoder 10a is as follows.

An audio / video separator 100 that separates the input audio / video signal into a video signal, a main language audio signal, and a negative language audio signal, and converts the separated video signal, the main language audio signal, and the sub-language audio signal into digital signals, respectively. The signals output from the encoder 104 and the encoder 104 which encode the respective signals output from the A / D converter 102 and the A / D converter 102 according to the respective compression schemes are encoded in a stacked channel. A system layer encoder 106 outputs to an encoder.

Here, the A / D converter 102 includes a video A / D converter 102a for converting the separated video signal into a digital signal, and a first audio signal A / D for converting the separated main language audio signal into a digital signal. A conversion unit 102b and a second audio signal A / D converter 102c for converting the separated sublingual audio signal into a digital signal.

In addition, the encoder 104 includes a video signal encoder 104a for compressing the video signal output from the video signal A / D converter 102a by an amplifier method, and a main output from the first audio signal A / D converter 102b. A first audio signal encoder (104b) for compressing a language audio signal in an amplifier or AC3 method, and a second audio signal output from the second audio signal A / D converter (102c) in an amplifier or AC3 method. Two audio signal encoders 104c.

In addition, the configuration of the audio / video decoder 10b is as follows.

Stack decoder 120 for decompressing the stacked video / audio signals output from the channel decoder, decoder 122 for decoding each signal separated into a video and audio signal in stack decoder 120, and decoder 122 D / A converter 124 converts the video signal and the audio signal, respectively, decoded by the analog signal into analog signals.

Here, the decoder 122 includes a video signal decoder 122a for extending a video signal in an amplifier method and an audio signal decoder 122b for extending an audio signal in an amplifier or AC3 method.

In addition, the D / A converter 124 outputs the video signal D / A converter 124a for converting the video signal output from the video signal decoder 122a into an analog signal, and the audio signal decoder 122b. And an audio signal D / A converter 124b for converting the audio signal into an analog signal.

5 is a flowchart illustrating a method for recording a bilingual language according to the present invention.

The number of transmission languages of the audio signal is determined (step 50). That is, the number of transmission languages of the audio signal output from the RF receiver of the television signal is determined.

A multilingual audio flag is set in the information file (step 52). That is, if the number of transmission languages determined in step 50 is composed of a main language and a sub-language, a multi-language audio flag in the information file is set.

The stream IDs of the main language and the sub-language are set, and the set stream ID is recorded (step S54). That is, the stream IDs set in the information file are recorded by setting the stream IDs of the main language and the sub-language according to the audio signal compression method. At this time, a program having one transmission language number of audio signals sets the stream IDs of the main language and the sub-language in the same manner.

Band compression is performed on one video signal and two audio signals (step 56). That is, band compression is performed on one video signal and two audio signals according to a predetermined compression scheme.

Multiplex the compressed signal (step 58). Multiplexing is performed to simultaneously burn down multiple streams of information through a single transmission path so that buffer overflow and underflow do not occur when one compressed video bitstream and two audio bitstreams are reproduced. The two audio streams then have the same SCR and PTS.

6 is a flow chart illustrating a method for selecting a bilingual language recorded in accordance with the present invention.

The multi-language audio flag is checked (step 60).

It is determined whether the flag is set (step 62). That is, the multi-language audio flag recorded in the information file is checked to determine whether this flag is set.

As a result of step 62, if the flag is set, the user is notified of the recording of the main language and the sub language (step 64). At this time, the user selects a desired language.

After the stream of the language selected by the user is decoded and decoded, it is reproduced (step 66). That is, the stream ID of the language selected by the user is checked, and only the selected stream is separated from the composite signal for audio decoding and then reproduced.

However, if the flag is not set in step 62, the audio stream is decoded and played (step 68).

As described above, according to the recording / reproducing apparatus of an optical disc capable of recording / reproducing bilingual audio signals and the recording / reproducing method according to the present invention, audio of up to two languages provided by a broadcast program together with a video signal is provided. By recording the signal, it is possible to reproduce the broadcast of the desired language according to the user's selection, thereby providing the effect of faithfully reproducing the contents of the service according to the broadcast program.

Claims (6)

An audio / video codec unit (CODEC) for compressing audio and video signals of two countries input from the outside during recording, and for expanding the compressed signal during playback; A channel codec unit for converting a compressed audio / video signal to a recording format during recording and for converting to a playback format during playback; An RF amplifier for converting an electrical signal input during recording into an optical signal and converting the optical signal into an electrical signal during reproduction; A pickup unit for recording and reproducing the optical signal and the electrical signal on a disc; A servo unit receiving the output signal of the RF amplifier and information necessary for servo control from a channel codec unit to perform an operation of the pickup unit; And An optical disc recording / reproducing apparatus capable of recording / reproducing bilingual audio signals including a system control unit for managing and controlling all data during recording / reproducing and interfacing with a user. The data input of claim 1, wherein the external input data includes an attribute file of an audio / video file and an audio file, and an information file for random search. An optical disc recording / reproducing apparatus capable of recording / reproducing bilingual audio signals. 3. The information file according to claim 2, wherein the information file includes an area indicating whether audio signals of two countries are recorded, and an area capable of designating an attribute of an audio signal of an assigned stream ID of a primary language and a secondary language. An optical disc recording / reproducing apparatus capable of recording / playing back audio signals. The method of claim 1, wherein the audio / video codec unit An audio / video splitter for separating the input audio / video signal into a video signal, a main language audio signal, and a negative language audio signal, and A for converting the separated video signal, the main language audio signal, and a negative language audio signal into digital signals, respectively. Audio / video including a / D converter, an encoder for encoding each signal output from the A / D converter according to each compression scheme, and a stacked encoder for encoding the signals output from the encoder in a stack and outputting them to the channel encoder An encoder; A stacked decoder which decompresses the stacked video / audio signal output from the channel decoder, a decoder which decodes each signal divided into a video and an audio signal in the stacked decoder, and a video signal which is respectively decoded by the decoder. An audio / video decoder capable of recording / reproducing bilingual audio signals, comprising: an audio / video decoder comprising a D / A converter for converting audio signals into analog signals. An optical / video recording / reproducing apparatus for audio / video, comprising the steps of: recording an audio / video signal transmitted from a broadcasting station, Determining the number of transmission languages of the audio signal transmitted from the broadcasting station; Setting a multi-language audio flag in the information file if the number of determined transmission languages is composed of a main language and a sub-language; Recording the stream ID set in the information file by setting the stream IDs of the main language and the sub-language according to an audio signal compression method; Band-compressing the input video signal and the two audio signals according to a predetermined compression scheme; And And multiplexing the compressed one video bitstream and the two audio bitstreams. In the optical disk recording / playback apparatus for audio / video, the method for reproducing the recorded audio / video signal, Checking the multi-language audio flag recorded in the information file of the audio / video data to determine whether the flag is set; If the flag is set, informing the user of the facts of recording the main language and the sub-language; And A method of reproducing a recorded two-nation audio signal comprising checking a stream ID of a language selected by a user, separating only the selected stream from the composite signal, and decoding the audio.