CN1495756A - Optical recording and/or reproducing device - Google Patents
Optical recording and/or reproducing device Download PDFInfo
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- CN1495756A CN1495756A CNA021407320A CN02140732A CN1495756A CN 1495756 A CN1495756 A CN 1495756A CN A021407320 A CNA021407320 A CN A021407320A CN 02140732 A CN02140732 A CN 02140732A CN 1495756 A CN1495756 A CN 1495756A
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Abstract
The present invention provides a method for distributing channel identification character (ID) of voice frequency signal, method for selecting voice frequency channel by utilizing said method and device suitable for them. The described method selects the voice frequency channel of A/V data flow containing several programs, every program contains at least two voice frequency data flows, every voice frequency data flow contains at least two subvoice frequency data flows of series ID which are non-repeatable and have the correspondent predefined priority. It includes the following steps: (a). when a program is changed into another program, in the changed program searching that it has the subvoice frequency data flow of channel ID which is identical to the subvoice frequency data flow distributed to reproduced program before change or not; and (b). when the existence of the described subvoice frequency data flow is defined in step (a), selecting said data flow.
Description
The application is to be that January 17, application number in 2000 are 00101086.7, are entitled as the dividing an application of patented claim of " method of allocated channel identifier and selective channel, optical recording and transcriber " applying date.
The present invention relates to a kind of distribution voice-grade channel identifier (identification, ID) method, by this method, when program or audio data stream at the audio/video that is used for reproducing the program that contains a plurality of audio data streams (A/V) when device changes, can follow the tracks of and select user-selected voice-grade channel, the invention still further relates to a kind of method and a kind of optical recording and transcriber that is suitable for them that utilizes this method to select voice-grade channel.
Current, motion picture expert group (moving picture engineering group, MPEG) and AC3 through being often used as the method for compressed encoding sound signal.Linear pulse code modulation (PCM) (pulse codemodulation, PCM) in, sound signal be not be compressed the coding but by the former state record.(digital video disk DVD) in these digital A/V devices, mainly uses MPEG at digital TV broadcasting or CD-Video S and digital video disk.
When the encoded data stream of MPEG A/V data and other data stream are combined and are applied in the practical application, be necessary to generate a data stream by making up these data stream.Also can use auxiliary data according to certain applications.The effect of mpeg system is that video and voice data are carried out synchronously with multiplexed.
In mpeg system, adopt grouping (packet) to carry out multiplexed.Carry out when multiplexed adopting grouping, each video and voice data are divided into a plurality of data stream that are called grouping, these groupings have suitable length, append in the grouping such as the information of head etc., and the grouping of these videos and voice data are by multiplexed.
The recognition data item that is used for that grouping is included in the zone that is called packet header is the video or the information of voice data, as shown in Figure 1.The length of grouping depends on transmission medium or application scenario.
Table 1 is used to show the content of packet header shown in Figure 1.
Table 1
| Main project | |
| ??Packet_start_code_prefix | ????“00?00?01”h |
| ????stream_id | 1 byte is used to distinguish the data items kind |
| Pts value | |
| (DTS value) | |
| Data | Video data, mpeg audio data or exclusive data |
In table 1, Packet_start_code_prefix represents the beginning of dividing into groups, and the data item type of stream_id in representing to divide into groups.For example, under the situation of video data, stream_id is binary code " 1,110 0000 " b.Under the situation of voice data, stream_id is a binary code " 1,100 0
* *" b.Here,
* *Eight kinds of data stream that express possibility and exist to 111b with 000b.In mpeg system, other data item except that these two kinds of data item all is defined as private data stream.Code " 10111101 " b can be used for private data stream.
The demonstration time mark that in the mpeg system standard, defines (presentation time stamp, PTS) and the decoding time mark (decoding time stamp DTS) represents time that the display unit in video or the voice data is exported and decoded respectively.Display unit is the frame of the picture in the video data and the frame of the audio frequency in the voice data.Under the situation of voice data, do not need DTS.
Except that the mpeg audio data, be implemented as private data stream such as the voice data of AC3 or LPCM.The content of the packet header that private data stream adopts is as shown in table 2.
Table 2
| Main project | |
| ????Packet_start_code_prefix | ????“00?00?01”h |
| ????stream_id | ????“1011?1101”h |
| Pts value | |
| ????substream_id | AC3 or LPCM |
| ????number_of_audio_channels | The voice-grade channel number |
| Data |
In table 2, substream_id is used to distinguish the audio data coding type such as AC3 or LPCM.For example, under the situation of AC3, substream_id is " 1,010 0
* *" b.Here,
* *Expression resembles eight kinds of data stream that exist in mpeg audio.In mpeg system, a program can have various video data streams and audio data stream.
The number of term " number_of_audio_channels " expression channel.Have 1ch, 2ch, 3ch, 4ch and dual single channel (dual mono channel).The channel here is different from the channel that the user selects.That is, above channel is a channel In the view of the user except that dual single channel.Dual single channel is considered to two channels.
In MPEG-1 or MPEG-2 program data stream (PS), there is the last layer of video or audio packet, be called bag (pack).In a word, be counted as an elementary cell by making up the bag that a plurality of groupings form.Fig. 2 shows the structure of this bag.The head of bag exist be used for reproduced in synchronization time the additional information of base benchmark (timebased reference).
Table 3 shows the content of packet header shown in Figure 2.
Table 3
| General data | |
| ????Packet_start_code | ????“00?00?01?BA”h |
| ????“01” | Illustrate that data are MPEG-2 |
| The SCR value | |
| ????program_mux_rate | |
| ????pack_stuffing_length |
In table 3, Pack_start_code is the code that the bag data begin.SCR value representative bag data arrive the time of the impact damper of demoder, and are used to make the system clock of encoder port like those shown synchronous with the system clock of decoding port.Progarm_mux_rate represents transfer rate, and video, audio frequency and exclusive data item carry out multiplexed with this speed and transmission.For being correctly decoded data, these data must be transmitted with the transfer rate that is higher than described transfer rate.Pack_stuffing_length represents the number of pseudo-(dummy) data.
Fig. 3 schematically show each channel and with its corresponding audio signal.As shown in Figure 3, sound signal is output by demoder.Have dual single-channel data of output, promptly the voice data of the voice data of CH0 and CH1 is similar to the 2ch data.Yet dual forms data is different from 2ch data part and is, a left side and right audio signal in the 2ch data are interrelated, and CH0 in the dual forms data and CH1 are sound signals independently.
For example, in dual single channel, the Korean voice data can be loaded into CH0 and the English voice data can be loaded into CH1.Therefore, in common two channels an output is only arranged, perhaps CH0 voice data and CH1 voice data are output by left speaker and right loudspeaker respectively.
Fig. 4 shows the device that is used to decode and exports dual single-channel data.When selecting signal to be 0, device output CH0 audio frequency shown in Figure 4 is used as left audio frequency and right audio frequency.When selecting signal to be 1, this device output CH1 audio frequency is used as left audio frequency and right audio frequency.When selecting signal to be 2, this device exports CH1 respectively and the CH2 audio frequency is used as left audio frequency and right audio frequency.
Fig. 5 schematically shows the method for more voice sound signal as dual single audio frequency data recording or reproduction.The more voice sound signal is formed by main audio data and secondary voice data.When data were recorded, main audio data and secondary voice data were encoded into audio data stream by the more voice scrambler.Meanwhile, main audio data is encoded into the CH0 voice data and secondary voice data is encoded into the CH1 voice data.
When data were reproduced, audio data stream was decoded into CH0 voice data and CH1 voice data by the more voice demoder.The CH0 voice data is a main audio data and the CH1 voice data is secondary voice data.
Here, suppose and have a plurality of audio data streams.Give an example, when having two audio data streams in the A/V data stream, the user can select in two channels.When selected audio data stream is dual forms data, that is, when including secondary audio data stream, the user can select two channels.
When an object of the present invention is to provide a kind of each audio data stream in the audio/video that is comprising a plurality of audio data streams (A/V) data stream and all being in double-mode, (ID) distributes to the method that is included in the secondary audio data stream in the audio data stream with channel indicator.
Change although another object of the present invention provides a kind of program or voice data of A/V device of the audio data stream that is used for reproducing the dual monotype of a plurality of permissions, also can select the method for the voice-grade channel of same type by the voice-grade channel of following the tracks of user's input.
Correspondingly, for reaching above first purpose, a kind of method of distributing voice-grade channel ID is provided, and wherein, (n is the priority of audio data stream to channel id 2n-1,1,2,3 ...) be assigned to the audio data stream in audio/video (A/V) data stream, described audio/video (A/V) data stream comprises at least two kinds of audio data streams, its each all be in dual monotype.
For reaching above-mentioned second purpose, a kind of method that is used to select the voice-grade channel of A/V data stream is provided, described A/V data stream comprises a plurality of programs, each program comprises at least two kinds of audio data streams, every kind of audio data stream comprises at least two secondary audio data streams that do not repeat and have corresponding to a series of ID of predetermined priority, described method comprises step: when a program was changed into another program, whether search existed the secondary audio data stream with Information ID identical with the channel id of the secondary audio data stream of distributing to the program that is reproducing before described program changes in the program after change; And, when existence has the secondary audio data stream of the channel id identical with the channel id of the secondary audio data stream of distributing to the program that is reproducing before described program changes, select described secondary audio data stream.
For reaching above-mentioned the 3rd purpose, a kind of optical recording and transcriber are provided, this device comprises: a pickup unit is used for the light signal from dish is picked up; One RF AMP (radio frequency amplifier) is used for converting the light signal that described pickup unit generates to electric signal and extraction (extract) servosignal and modulating data; One digital signal processor is used for separating the A/V data stream of transferring to export compression by the modulating data that described RF AMP is provided; One servo unit is used for receiving information from described RF AMP, and this information is the servo and system controller of control and carries out the desired information of servo operation; One AV codec (codec), the compression A/V data stream that is used for that described digital signal processor is provided is decoded and is exported the A/V data stream that comprises a plurality of audio data streams; One key input unit is used to import user's key input; With a system controller, be used for carrying out user interface and the described pickup unit of control by described key input unit, described RF AMP, described digital signal processor and described AV codec, wherein, when a program changes over another program, whether search exists the identical secondary audio data stream of channel id that has and distribute to the secondary audio data stream of playback of programs before program changes in the program of described system controller after change, and selects to have the secondary audio data stream of the channel id identical with the channel id of the secondary audio data stream that is assigned to playback of programs before the program change in the program after change.
By the reference accompanying drawing the preferred embodiments of the present invention are described in detail, above purpose of the present invention and advantage will become brighter and clearer, in the accompanying drawing:
Fig. 1 shows the structure of the grouping in the mpeg system;
Fig. 2 shows the structure of the bag in the mpeg system;
Fig. 3 shows the sound signal in each channel;
Fig. 4 shows dual single-channel data is decoded and the example of the device exported;
Fig. 5 schematically shows more voice audio signal recording and the method that is reproduced as dual single audio frequency data; And
Fig. 6 is the block scheme that shows according to the structure of optical recording of the present invention and transcriber.
According to the present invention, in the method for distributing voice-grade channel identifier (ID), different channel ids is assigned to each voice-grade channel that is included in the program.
Table 4 shows when having write down three audio data streams in a program, and channel id is assigned to the example of data stream.
Table 4
| Non-dual list | Dual list | ||
| Channel id | Channel id | ||
| Data stream 1 | ????1 | ????CH0 | ????1 |
| ????CH1 | ????2 | ||
| Data stream 2 | ????3 | ????CH0 | ????3 |
| ????CH1 | ????4 | ||
| Data stream 3 | ????5 | ????CH0 | ????5 |
| ????CH1 | ????6 |
Removing under other situation of dual one-state (case), provided channel id such as 2n-1 (n=1,2 and 3).At this moment, n is identical with number of data streams.Under dual single situation, channel id 2n-1 gives CH0 and channel id is given CH1.
When the user when press subaudio frequency change key such as the device of telepilot, than the bigger number of current reproduction channel id by select progressively and output.When user's selective channel ID, selected corresponding to the audio data stream of this ID, the decoding and output.
According to the present invention, in the voice-grade channel system of selection, when program changed, the voice-grade channel of selecting in the previous program is tracked and selection in next program.And, when before program changes, not having voice-grade channel, will select the voice-grade channel of acquiescence.
Here, suppose the new data stream of input when data are reproduced.In new data stream, can write down the voice data of the data stream that is different from the front.For example, when a kind of dual single audio frequency data stream of record in the data stream in front, in new data stream, will write down two kinds of non-dual single data streams.
According to the present invention, in the voice-grade channel system of selection, when existing when wanting the data of reproduced channel id, these data are selected and reproduce.When defaulting to when not having corresponding data, the selected and output corresponding to the data of channel id-1.
When existing corresponding to data at reproduced channel id just, these data are selected and reproduce.When not having corresponding data, and when current channel is even-numbered, search for current channel id-1.When the data that exist corresponding to channel id-1, the selected and output of these data.When not having described data, the selected and output corresponding to the data of channel id 1.When not existing corresponding data and current channel to be the odd data numbering, the selected and output corresponding to the data of channel id 1.
Table 5 shows another example of the combination of audio data stream.
Table 5
| Program 1 | Program 2 | ||
| Data stream 1 (dual list) | CH0; Channel id 1 | Data stream 1 (non-dual list) | Channel id 1 |
| CH1; Channel id 2 | |||
| Data stream 2 (dual list) | CH0; Channel id 3 | Data stream 2 (non-dual list) | Channel id 3 |
| CH1; Channel id 4 |
For example, when depressing audio frequency in the reproduction process of user at program 1 and change key, output audio signal changes with the order of the CH1 of the CH0 of the CH1 of the CH0 of data stream number 1, data stream number 1, data stream number 2 and data stream number 2.
When the CH0 that by selective channel ID is 3 data stream number 2 comes playback of programs 1 and wants to reproduce next program 2, will examination whether there be the data of channel id 3.Because in program 2, have data stream 2, so data stream 2 is reproduced corresponding to channel id 3.
When the CH1 that by selective channel ID is 4 data stream 2 comes playback of programs 1 and wants to reproduce next program 2, will examination whether there be the data of channel id 4.Because in program 2, there are not data, be that 1 data stream 1 is selected and reproduce as the channel id of default channel corresponding to channel id 4.
Whether preferably change in the method for channel at another, will examine or check has by deduct 1 resulting channel id 3 from channel id 4.When having this channel id, then select this channel id.When not having this channel id, channel id is that 1 data stream 1 can be selected and reproduce.In this case, because there are the data of channel id 3, so the data of channel id 3 are reproduced.
According to method of the present invention, when channel id was odd-numbered, this channel was the main audio channel in non-dual single channel or the dual single channel.When channel id was even-numbered, this channel was the secondary voice-grade channel in the dual single channel.
When the user changes voice-grade channel, concerning the user, preferably no matter whether the channel of voice data is classified into independent audio data stream or is categorized as dual single channel, channel all will obtain changing.
According to voice-grade channel system of selection of the present invention, when receiving audio frequency change key, the change from main audio to secondary audio frequency is being carried out corresponding audio data stream, and carries out the change of next voice data.
When the user selects a voice-grade channel, even if the channel of current selection still is held under the reformed situation of program.
Yet when not having corresponding voice-grade channel, channel must be changed into suitable channel, and the channel after changing must be selected.At this moment, selected and the reproduction of default channel CH0, the channel of voice-grade channel that perhaps approaches most current selection is searched, reproduced then (when channel id is even-numbered, that is to say, under the situation of secondary voice data, the main audio channel, be the channel id-1 of odd-numbered, can be considered to nearest channel).
And, when the audio data stream that do not exist corresponding to the channel id of current setting, channel id is stored, and primary channel selected and output by above-mentioned method, selected and the reproduction of perhaps nearest channel, and when the audio data stream corresponding to above channel id occurs, the selected and output of data.
This is to select and reproduce under the situation of secondary voice-grade channel and realize the user, selects then and reproduces the program that another does not have secondary audio frequency in short-term, and when the program that has secondary audio frequency is reproduced, selects and reproduces initial secondary audio frequency.Do not do as, the user must carry out to change and reproduce secondary audio frequency.
Fig. 6 is the block scheme that is suitable for optical recording of the present invention and transcriber.The A/V data are recorded by recordable disc and reproduce.The function of optical recording and transcriber can be divided into record and reproduce.
In the process of record data, the A/V signals that 110 pairs of AV codecs receive from the outside by predetermined compression scheme carry out compressed encoding and information about the quantity of packed data are provided.Digital signal processor (digital signal processor, DSP) 120 receive the A/V data that provide from AV codec 110, divide to be used in and handle error correcting code (error correction code, additional data ECC), and carry out modulation by predetermined modulation scheme.Radio-frequency amplifier (RF AMP) 130 becomes light signal with the electric data-switching that DSP 120 provides.
Pickup unit 140 comprises and is used for writing down on CD from the light signal of RF AMP 130 and the driver of carrying out focusing and following the tracks of.Servo unit 150 receives the servo desired information of control and controls described servo from RF AMP 130 and system controller 160.
System controller 160 control total systems, the coding mode of decision voice data is recorded in data on the CD and controls this data.
In the process of reproducing data, pickup unit 140 picks up light signal from the dish of storage data.Data are extracted from light signal.RF AMP 130 will convert electric signal and extraction from the light signal of pickup unit 140 to and be used to control servo and servosignal modulating data.
120 couples of DSP carry out demodulation by the modulating data of the electric signal that the RF AMP 130 corresponding to the modulation scheme that is used for modulating data is provided, and remove additional data by carrying out ECC.Servo unit 150 receives the servo desired information of control and carries out servo operation from RF AMP 130 and system controller 160.
The compression A/V data that 110 couples of DSP 120 of AV codec provide are decoded and are exported the A/V signal.
System controller 160 is carried out user interface, for example, it is by the key input of above method process user, control pickup unit 140, RF AMP 130, DSP 120 and AV codec 110, and part 140, RF AMP 130, DSP 120 and AV codec 110 are picked up in audio data stream and control, and the order that is used to change voice-grade channel with box lunch is selected when key input unit 170 receives and reproduced corresponding voice data.
As previously discussed, according to channel id distribution method of the present invention, when selecting sound signal, can follow the tracks of identical channel by each channel of different channel ids being distributed to audio data stream.
According to voice-grade channel system of selection of the present invention, when program or audio data stream change, can follow the tracks of user-selected audio mode.
Although more than described the preferred embodiments of the present invention, the invention is not restricted to this, those of ordinary skills can carry out many modifications and retouching to the present invention in the spirit and scope of the present invention that claims limited.
Claims (9)
1. optical recording and/or transcriber are used for record and/or reproduce a plurality of programs, and each program comprises at least two audio data streams, and each audio data stream has dual single channel, and described device comprises:
Light picker is launched an incident light; With
Processing unit, handle an information signal, with the incident light of control by described light picker generation, one of dual single channel of one of audio data stream of reproduction top line, change to second program, if one of the dual single channel of one of audio data stream of determining described second program reproduces a described dual single channel of an audio data stream of described second program whether corresponding to a dual single channel of an audio data stream of described first segment purpose with there is described correspondence.
2. device as claimed in claim 1, wherein, if described processing unit determines not exist described correspondence, described processing unit reproduces corresponding to one of audio data stream of described second program with described described audio data stream of dual single-channel first segment purpose.
3. device as claimed in claim 1, wherein, if described processing unit determines not exist described correspondence, described processing unit reproduces and has a described described audio stream of dual single-channel first segment purpose and have the channel of one of audio data stream of second program of immediate sequence of states.
4. device as claimed in claim 1, wherein, if described processing unit is determined not have described correspondence, described processing unit reproduces the default channel of one of audio data stream of described second program.
5. the method for claim 1, wherein, if described processing unit determines not exist described correspondence, described processing unit reproduces than having the channel that a described described audio data stream of dual single-channel first segment purpose has one of the audio data stream of described second program of high priority order more.
6. optical recording and/or transcriber, be used for writing down and/or reproducing the audio data stream of the A/V data stream that comprises a plurality of programs, each program comprises at least two audio data streams that at least one channel is arranged, each audio data stream has dual single channel, wherein each channel has the channel id according to the predefined procedure of right of priority in this program, and described device comprises:
Light picker, emitting incident light; With
Processing unit, handle an information signal, with the incident light of control by described light picker generation, when top line was changed to second program, whether search exists had the second dual single channel of distributing to second program of the described first segment purpose first dual single-channel channel id same channel ID that is reproducing with described change before; If search for successfully, select the described second dual single channel with described.
7. device as claimed in claim 6, wherein:
If described search is unsuccessful, described processing unit selects to have than the described first dual single channel channel of described second program that the channel of high priority order more selects number.
8. device as claimed in claim 6, wherein:
If described search is unsuccessful, described processing unit is selected a channel of described second program that correspondence the most approaching described first dual single-channel channel selects number.
9. device as claimed in claim 6, wherein: if described search is unsuccessful, described processing unit is selected a default channel of described second program.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02140732 CN1282970C (en) | 2000-01-17 | 2000-01-17 | Optical recording and/or reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02140732 CN1282970C (en) | 2000-01-17 | 2000-01-17 | Optical recording and/or reproducing device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001010867A Division CN1144214C (en) | 2000-01-17 | 2000-01-17 | Distributing channel identification symbol and method for selecting, channel, optical recording and reproduction device |
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| Publication Number | Publication Date |
|---|---|
| CN1495756A true CN1495756A (en) | 2004-05-12 |
| CN1282970C CN1282970C (en) | 2006-11-01 |
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| CN 02140732 Expired - Fee Related CN1282970C (en) | 2000-01-17 | 2000-01-17 | Optical recording and/or reproducing device |
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