JPH1021648A - Audio data reproduction method, and software driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an audio data reproduction method and a software driver utilizing a DVD(Digital Versatile Disk) decoder board, capable of reproducing audio data other than the ones in a format handled by the DVD decoder board by using the DVD decoder board connected to a data processing apparatus via a bus line, thereby, an audio reproduction function of the DVD decoder board is effectively utilized so that a system with high capability and extensibility can be easily built. SOLUTION: A CPU 12 in a main body of a personal computer performs a pack processing operation for an original audio data (DolbyAC-3/LinearPCM/ MPEG-Audio) 11 by using an audio reproduction software driver (ASDRV) 13A in a main memory(MEM) 13. Thus, an audio pack is generated to be then transferred to a DVD decoder board(DVD-DEC) 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video recorder (DV) using a DVD decoder board connected to a data processing device via a bus.
The present invention relates to an audio data reproduction method applied when reproducing audio data other than the format handled by the D decoder board, and an audio reproduction software driver.

[0002]

2. Description of the Related Art DVDs connected to a data processing device via a bus
Decoder board is DVD (DigitalVersatile Disk)
It has a function of reproducing audio data attached to Video, and can reproduce a moving image with audio.

At this time, audio data accompanying DVD-Video is supplied to a DVD decoder board as audio data (audio pack) packed according to a predetermined plan.

As a specific example, a DVD decoder board connected to a data processing device via a bus includes a Dolby AC-
3 (Dolby AC-3) decoder circuit, and extracts a Dolby AC-3 audio pack from a DVD format conforming to a predetermined DVD standard to extract the Dolby AC-3 audio pack.
-3, the Dolby A
The sound (sound) of C-3 is reproduced and output.

[0005] However, in the above-mentioned conventional technique, the audio data supplied to the DVD decoder board is
If the audio format is not the Dolby AC-3 audio pack format according to the DVD format, a reproduced output cannot be obtained from the Dolby AC-3 decoder circuit.

That is, although the DVD decoder board has a built-in Dolby AC-3 decoder circuit, the original data of the Dolby AC-3 which is not in the DVD format (Dolby AC-3 audio pack) is stored in the DVD decoder board. , The Dolby AC-3 data cannot be decoded, reproduced and output.

Therefore, conventionally, in a personal computer equipped with a DVD decoder board, the same type of audio data (for example, Dolby AC-3 audio data) other than the audio pack (for example, Dolby AC-3 audio pack) conforming to the DVD format is used. ) Cannot be reproduced and output using the DVD decoder board. For this reason, conventionally, DVD
Even when a decoder board is mounted, the audio reproduction function of the DVD decoder board is limited to a narrow range, and there is a problem that the audio reproduction function of the DVD decoder board cannot be effectively used.

[0008]

As described above, conventionally, even if a DVD decoder board incorporates, for example, a Dolby AC-3 decoder circuit for audio reproduction, the DVD format (Dolby AC-3) is used. When the original data of the Dolby AC-3 which is not the audio pack is transferred to the DVD decoder board, the data of the Dolby AC-3 cannot be decoded, reproduced and output. Therefore, conventionally, in a personal computer equipped with a DVD decoder board, the same type of audio data (for example, Dolby AC-3 audio data) other than an audio pack (for example, Dolby AC-3 audio pack) that conforms to the DVD format is used. Since reproduction and output cannot be performed using the DVD decoder board and the audio reproduction function of the DVD decoder board is specified in a narrow range, there is a problem in terms of functionality and expandability.

The present invention has been made in view of the above circumstances,
The DVD decoder board connected to the data processing device through the bus can reproduce audio data in a format other than the format handled by the DVD decoder board, and effectively utilizes the audio reproduction function of the DVD decoder board to provide functionality and expandability. High system can be easily constructed, D
An object of the present invention is to provide an audio data reproducing method and a software driver using a VD decoder board.

[0010]

The present invention utilizes a DVD decoder board bus-connected to a data processing device.
An audio data reproducing method for reproducing audio data other than the format handled by the DVD decoder board, means for inputting original audio data other than the format handled by the DVD decoder board, and handling the input original audio data by the DVD decoder board Means for processing the audio pack, and means for transferring the processed audio pack to a DVD decoder board, wherein the DVD decoder board bus-connected to the data processing device converts audio data other than the format handled by the DVD decoder board. It is characterized by reproducing.

Further, according to the present invention, in the above-mentioned audio data reproducing system, the input original audio data is stored in a DVD.
MPEG audio handled by the decoder board (MPEG-
Audio) or Linear PCM (LinearPC)
M) or Dolby AC-3 (Dolby AC-3).

The present invention also relates to an audio data reproducing method for reproducing audio data other than the format handled by the DVD decoder board by using a DVD decoder board connected to the data processing device via a bus. Means for inputting original audio data other than the format to be handled; means for determining the type of the input original audio data; and inputting the original audio data when the type of the input original audio data is Dolby AC-3. It is characterized by comprising means for processing data into an audio pack of Dolby AC-3, and means for transferring the processed audio pack of Dolby AC-3 to a DVD decoder board.

The present invention also relates to an audio data reproducing method for reproducing audio data other than the format handled by the DVD decoder board by using a DVD decoder board connected to a data processing device via a bus. Means for inputting original audio data other than the format to be handled, means for determining the type of the input original audio data, and means for inputting the original audio data when the type of the input audio data is MPEG audio. M handled by DVD decoder board
It is characterized by comprising means for processing an audio pack of PEG audio, and means for transferring the processed audio pack of MPEG audio to a DVD decoder board.

The present invention also relates to an audio data reproducing method for reproducing audio data other than the format handled by the DVD decoder board by using a DVD decoder board connected to the data processing device via a bus. Means for inputting original audio data other than the format to be handled, means for determining the type of the input original audio data, and means for converting the input original audio data when the type of the input original audio data is linear PCM. Linear P handled by DVD decoder board
It is characterized by comprising means for processing into a CM audio pack and means for transferring the processed linear PCM audio pack to a DVD decoder board.

The present invention also relates to an audio data reproducing method for reproducing audio data other than the format handled by the DVD decoder board by using a DVD decoder board connected to the data processing device via a bus. Means for inputting original audio data other than the format to be handled; means for determining the type of the input original audio data; and inputting the original audio data when the type of the input original audio data is Dolby AC-3. Means for processing data into an audio pack of Dolby AC-3, and MP for handling the input original audio data on a DVD decoder board when the type of the input original audio data is MPEG audio.
Means for processing into an audio pack of EG audio;
When the type of the input original audio data is linear PCM, means for processing the input original audio data into a linear PCM audio pack handled by the DVD decoder board, and transfers the processed audio pack to the DVD decoder board. Means.

Further, the present invention is characterized in that in the above-mentioned audio data reproducing system, recording means for an audio pack is provided. Further, the present invention is a software driver used when reproducing audio data other than the format handled by the DVD decoder board using a DVD decoder board connected to the data processing device via a bus, Processing routine for reading original audio data to be processed, processing routine for processing the input original audio data into an audio pack corresponding to the type,
And a processing routine for transferring the data to the decoder board.

Further, according to the present invention, in the above software driver, the type of the input original audio data is MP
EG audio or linear PCM or Dolby AC
When the value is -3, a processing routine for processing the input original audio data into an audio pack corresponding to the type is provided.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a system for realizing an audio data reproducing method according to an embodiment of the present invention, and FIG. 2 is a flowchart showing a processing procedure of the above embodiment. Here, "Audio"
Is synonymous with "sound", audio data is called audio data, and audio packs are called audio packs.

In FIG. 1, reference numeral 11 denotes an original audio data input unit for inputting original audio data to be processed, which is realized using, for example, a storage device or an external audio data input terminal. Then, Dolby AC-3 (Dolb
yAC-3), Linear PCM,
Three types of original audio data of MPEG audio (MPEG-Audio) are selectively inputted.

Reference numeral 12 denotes a personal computer that processes (converts) original audio data, such as Dolby AC-3, input to the original audio data input unit (SD) 11 into an audio pack in a format handled by a DVD decoder board. In this case, the audio playback software driver (AS-DR) in the main memory (MEM) 13 is used.
V) 13A, the original audio data (D
olbyAC-3 / LinearPCM / MPEG-A
4) through FIG. 6 by executing the pack processing of FIG.
A voice pack is generated as shown in FIG.

Reference numeral 13 denotes a main memory (MEM) connected to the CPU 12 via a bus. In this example, original audio data (Dolby AC-3 / Linear PCM / MP) as shown in FIG.
EG-Audio) audio playback software driver (AS-DR) for executing pack processing
V) 13A is stored and accessed by the CPU 12.

Reference numeral 14 denotes a C connected via a system bus.
Under the control of the PU 12, a video pack having a format as shown in FIG. 3 and audio data (that is, an audio pack) subjected to pack processing as shown in FIGS. 4 to 6 are input and decoded. A DVD decoder board (DV) for outputting video and audio signals for reproduction.
D-DEC).

Reference numeral 15 denotes an audio pack having a pack structure as shown in FIGS. 4 to 6 which has been subjected to the pack processing under the control of the CPU 12 and is input via a system bus and stored, for example, a hard disk, a floppy disk, or a memory card. Memory for storing audio packs (E
XM).

Reference numeral 16 denotes a DVD drive for driving a DVD, and here, a DVD playback device (DVD-SY)
S). This DVD playback device (DVD-SYS) 1
Numeral 6 reproduces a stream of video data having a pack structure as shown in FIG. 3 together with audio data having a pack structure as shown in FIG. The pack-structured video and audio reproduction stream data is supplied to a DVD decoder board (DVD-DEC) 14, whereby a video signal and an audio signal for reproduction are output from the DVD decoder board (DVD-DEC) 14. Is done.

FIG. 2 shows an audio playback software driver (AS-DR) stored in the main memory (MEM) 13.
V) is a flowchart showing a processing procedure of the CPU 12 according to 13A. Here, three types of original audio data (Dolb
yAC-3 / LinearPCM / MPEG-Audi
3 shows a processing procedure when selectively receiving o) and performing pack processing.

In this case, the above three types of original audio data (Dolby AC-3 / Linear PCM / MPEG)
-Audio), Dolby AC-3 (Dolby)
Regarding AC-3), the pack processing step is shown, and the remaining linear PCM (Linear PCM), MPE
For G audio (MPEG-Audio), pack processing similar to that of Dolby AC-3 (Dolby AC-3) is performed except for differences in the type of data and the pack structure (format). Steps are omitted.

FIGS. 4 to 6 show examples of the pack structure (format) of each audio pack which has been subjected to the pack processing in the flowchart shown in FIG. FIGS. 3 to 6 show examples of the structure (format) of a pack handled in the embodiment of the present invention. FIG. 3 is a diagram showing an example of a pack structure of video data in a stream output from the DVD reproducing device (DVD-SYS) 16. or,
4 to 6 show the original audio data (Dolby AC-3 / Lin) input from the original audio data input unit 11, respectively.
3 shows an example of the structure of each audio pack when earPCM / MPEG-Audio is packed by the pack processing shown in FIG. 2 using an audio playback software driver (AS-DRV) 13A.

In the figure, "Pack Header" is a fixed-length pack header section having information such as a start code and a reference time, and "Packet Header" is a variable-length packet header section having information such as a stream ID.

The audio data having the pack structure shown in FIGS. 4 to 6 is stored in a DVD playback device (DVD-SYS) 16.
It has the same pack structure as the audio data included in the output stream.

The operation of the embodiment of the present invention will now be described with reference to the above-mentioned drawings. For example, when the original audio data of Dolby AC-3 is input to the original audio data input unit 11 for inputting the original audio data to be processed, the original audio data is controlled under the control of the CPU 12. 4 is processed into a voice pack having a pack structure as shown in FIG.

That is, the CPU 12 determines that the original audio data to be processed is a private stream Dolby AC-3 (Dolb) defined in the DVD format, for example.
yAC-3), the audio playback software driver (AS-DRV) in the main memory (MEM) 13
13A, the original audio data (Dolby AC-3 in this case) is packed as shown in FIG.
An audio pack having a format as shown in FIG. 4 is generated.

The processing at this time will be described with reference to the flowchart shown in FIG. Here, the type of original audio data to be processed is Dolby AC-3.
3), Linear PCM, MPEG
It recognizes which of audio (MPEG-Audio) it is (steps S1, S2, S3 in FIG. 2), and executes a pack processing in a format as shown in FIGS. 4 to 6 according to the recognized type (FIG. 2). 2 steps S4, S
5, S6).

That is, the original audio data is Dolby AC-3.
If it is (Dolby AC-3), pack processing of the format as shown in FIG. 4 is executed (step S1 in FIG. 2).
, S4), if it is a linear PCM (Linear PCM), the pack processing of the format as shown in FIG. 5 is executed (steps S2 and S5 in FIG. 2), and if it is MPEG audio (MPEG-Audio), as shown in FIG. The pack processing of the various formats is executed (steps S3 and S6 in FIG. 2).

The pack processing at this time is performed by Dolby AC
Taking Dolby AC-3 as an example, Dolby AC-3 (Dolby AC-3) of a private stream in which original audio data to be processed is defined in the DVD format
(byAC-3), the original audio data of the Dolby AC-3 is read in units of a predetermined data amount (step S41 in FIG. 2), and processed into an audio pack having a pack structure as shown in FIG. 4 (step S2 in FIG. 2). (S42, S43), and transfer to the DVD decoder board (DVD-DEC) 14 (steps S41 to S44 in FIG. 2).

The audio packs which have been subjected to the pack processing in a predetermined data amount unit are sequentially transferred to the DVD decoder board (DVD-DEC) 14 in the processing order (the order of generation), and are decoded each time to perform the audio processing. Signaled.

Such processing for processing the audio pack is repeatedly executed until all the original audio data is packed and transferred to the DVD decoder board (DVD-DEC) 14 (step S42 (Yes) in FIG. 2). You.

In addition, Dolby AC-3 (Dolby AC-
The linear PCM other than 3) and the MPEG audio (MPEG-Audio) are also processed into audio packs having a pack structure as shown in FIG. 5 or FIG.
-DEC) 14 and decoded.

By such processing, audio data such as Dolby AC-3 other than the format handled by the DVD decoder board (DVD-DEC) 14 is converted to a DVD decoder board (DVD-DE).
C) Reproduction can be performed by using 14.

In the embodiment described above, the DVD decoder board (DVD-DEC) 14 uses the Dolby AC-3.
(DolbyAC-3) and Linear PCM (Linea
rPCM) and MPEG audio (MPEG-Aud)
io), three types of audio packs are taken as an example. For example, Dolby AC-3 (Dolby A)
A configuration in which specific audio data is processed into an audio pack, such as C-3), may be used.

In the above-described embodiment, the system configuration in which the DVD decoder board (DVD-DEC) 14 and the DVD reproducing device (DVD-SYS) 16 are connected to the CPU 12 via the system bus has been exemplified. The present invention is not limited to this. For example, a configuration in which a DVD playback device (DVD-SYS) 16 is connected to the CPU 12 by a dedicated signal line, or a DVD playback device (DVD-SY)
The present invention can be applied to various system configurations such as a configuration in which S) 16 is connected as an optional device. In the above-described embodiment, the pack structure shown in FIGS. 4 to 6 has been described as an example. However, the present invention is not limited to this, and an audio pack structure other than the illustrated one may be used.

[0041]

As described above in detail, according to the present invention, a DVD decoder board connected to a data processing device through a bus can reproduce audio data in a format other than the format handled by the DVD decoder board. A system with high functionality and expandability can be easily constructed by effectively utilizing the audio reproduction function of the first embodiment.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of the embodiment.

FIG. 3 is a view showing an example of a video data pack structure in the embodiment.

FIG. 4 shows the Dolby AC-3 (Do) in the embodiment.
The figure which shows the pack structure example of lbyAC-3).

FIG. 5 is a view showing a linear PCM (Linear PCM) according to the embodiment.
FIG. 2 is a diagram showing an example of a pack structure of an arPCM).

FIG. 6 shows the MPEG audio (M
FIG. 3 is a diagram showing an example of a pack structure of PEG-Audio).

[Explanation of symbols]

11: Original audio data input unit, 12: CPU, 13: Main memory (MEM), 13A audio playback software driver (AS-DRV), 14: DVD decoder board (DVD-DEC), 15: Audio pack storage memory (EXM), 16 ... DVD playback device (DVD-SY
S).

Claims (10)

[Claims] 1. A DVD bus-connected to a data processing device
An audio data reproduction method for reproducing audio data other than the format handled by the DVD decoder board by using the decoder board, a means for inputting original audio data other than the format handled by the DVD decoder board; Means for processing data into an audio pack handled by the DVD decoder board; and means for transferring the processed audio pack to the DVD decoder board. The DVD decoder board connected to the data processing device via a bus provides An audio data reproduction method characterized in that audio data other than the format to be handled can be reproduced. 2. The input original audio data is stored on a DVD.
2. The audio data reproducing system according to claim 1, further comprising means for processing into an MPEG audio, linear PCM, or Dolby AC-3 audio pack handled by the decoder board. 3. A DVD bus-connected to a data processing device.
An audio data reproduction method for reproducing audio data other than the format handled by the DVD decoder board by using the decoder board, a means for inputting original audio data other than the format handled by the DVD decoder board; Means for discriminating the type of data, and the type of the input original audio data being Dolby AC-
3, when the input original audio data is processed into an audio pack of Dolby AC-3;
Means for transferring data to a decoder board. 4. A DVD bus-connected to a data processing device.
An audio data reproduction method for reproducing audio data other than the format handled by the DVD decoder board by using the decoder board, a means for inputting original audio data other than the format handled by the DVD decoder board; Means for determining the type of data; and when the type of input original audio data is MPEG audio, the input original audio data is
Means for processing into an audio pack of MPEG audio handled by the VD decoder board, and converting the processed audio pack of MPEG audio to DV
Means for transferring data to a D decoder board. 5. A DVD bus-connected to a data processing device
An audio data reproduction method for reproducing audio data other than the format handled by the DVD decoder board by using the decoder board, a means for inputting original audio data other than the format handled by the DVD decoder board; Means for determining the type of data; means for processing the input original audio data into a linear PCM audio pack handled by a DVD decoder board when the type of the input original audio data is linear PCM; Means for transferring a linear PCM audio pack to a DVD decoder board. 6. A DVD bus-connected to a data processing device.
An audio data reproduction method for reproducing audio data other than the format handled by the DVD decoder board by using the decoder board, a means for inputting original audio data other than the format handled by the DVD decoder board; Means for discriminating the type of data, and the type of the input original audio data being Dolby AC-
3, when the input original audio data is MPEG audio, the input original audio data is converted to a Dolby AC-3 audio pack.
Means for processing into an audio pack of MPEG audio handled by the VD decoder board; and when the type of input original audio data is linear PCM, the input original audio data is converted to an audio pack of linear PCM handled by the DVD decoder board. An audio data reproducing method, comprising: means for processing; and means for transferring the processed audio pack to a DVD decoder board. 7. The audio data reproducing method according to claim 1, further comprising an audio pack recording means. 8. A DVD bus-connected to a data processing device
A software driver used when reproducing audio data other than the format handled by the DVD decoder board using a decoder board, a processing routine for reading original audio data input as data to be reproduced; An audio playback software driver, comprising: a processing routine for processing audio data into an audio pack corresponding to the type; and a processing routine for transferring the processed audio pack to a DVD decoder board. 9. When the type of the input original audio data is MPEG audio, linear PCM, or Dolby AC-3, a processing routine for processing the input original audio data into an audio pack corresponding to the type is provided. The audio playback software driver according to claim 8, further comprising: 10. The audio reproduction software driver according to claim 8, further comprising an audio pack recording unit.