Audio and video reproduction apparatus, and audio and video reproduction method

• US 20010008577A1
• Filed: 01/19/2001
• Published: 07/19/2001
• Est. Priority Date: 01/19/2000
• Status: Abandoned Application

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: Yamada, Takao, kamei, Kazuo, Kojima, Eiji, Miyashita, Masahiko, Ohtani, Toshio, Ohyama, Nobuo
• Application Number:
  US09/764,078
• Publication Number:
  US 20010008577A1
• Time in Patent Office: Days
• US Class Current: 386/98
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 27/005 Reproducing at a different information rate from the information rate of recording for television signals H04N5/783
• CPC Class Codes: G11B 27/10 Indexing; Addressing; Timing or synchronising; Measuring tape travel
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/877 by assembling picture element blocks in an intermediate memory

Abstract

An audio and video reproduction apparatus performing variable seed reproduction is provided. In the apparatus, a video output controlling device controls an output of a decoded video signal. An audio output controlling device controls an output of a decoded audio signal. Then, a video/audio signal synchronization controlling device controls the video output controlling device so that a decoded video signal whose position on a time axis is coincident with that of the decoded audio signal is outputted in synchronism with the decoded audio signal.

Claims

1. An audio and video reproduction apparatus comprising:

a video output controlling device for controlling an output of a decoded video signal;

an audio output controlling device for controlling an output of a decoded audio signal; and

a video/audio signal synchronization controlling device for controlling the video output controlling device so that a decoded video signal whose position on a time axis is coincident with that of the decoded audio signal is outputted in synchronism with the decoded audio signal.

2. The audio and video reproduction apparatus according to

claim 1

, the apparatus further comprising a speed indicating device for indicating a reproduction speed,

wherein the audio output controlling device controls the output of the decoded audio signal based on the reproduction speed indicated by the speed indicating device.

3. The audio and video reproduction apparatus according to

claim 1

, the apparatus further comprising a speed indicating device for indicating a reproduction speed,

wherein the audio output controlling device controls the output of the decoded audio signal based on the reproduction speed indicated by the speed indicating device, and

the video output controlling device controls the output of the decoded video signal so that the decoded video signal is selectively outputted according to the reproduction speed.

4. The audio and video reproduction apparatus according to

claim 1

, the apparatus further comprising an audio memory for accumulating the decoded audio-signal,

wherein the audio output controlling device calculates an audio time stamp of the decoded audio signal, and

the video/audio signal synchronization controlling device controls the video output controlling device so that the decoded video signal whose video time stamp is coincident with the audio time stamp of the decoded audio signal calculated in the audio output controlling device is outputted in synchronism with the decoded audio signal.

5. The audio and video reproduction apparatus according to

claim 4

, the apparatus further comprising a video memory for accumulating the decoded audio signal,

wherein the video/audio signal synchronization controlling device calculates an address in the video memory corresponding to a video time stamp that is coincident with the audio time stamp acquired from the audio output controlling device,

the video output controlling device controls the output of the decoded video signal so that the decoded video signal is outputted according to the address in the video memory calculated by the video/audio signal synchronization controlling device.

6. The audio and video reproduction apparatus according to

claim 1

, the apparatus further comprising a decoder f or decoding an audio signal and a video signal in accelerating manner.

7. The audio and video reproduction apparatus according to

claim 1

, the apparatus further comprising a plurality of video signal decoders,

wherein contiguous GOPs configuring video signals are distributed to each video signal decoder.

8. An audio and video reproduction method comprising the process of:

decoding a video signal;

decoding an audio signal; and

controlling an output of the decoded video signal so that the decoded video signal whose position on a time axis is coincident with that of the decoded audio signal is outputted in synchronism with the decoded audio signal.

9. The audio and video reproduction method according to

claim 8

, the method further comprising the processes of:

indicating a reproduction speed, and

controlling an output of the decoded audio signal based on the indicated reproduction speed.

10. The audio and video reproduction method according to

claim 8

, the method further comprising the process of:

indicating a reproduction speed; and

controlling an output of the decoded audio signal based on the indicated reproduction speed,

wherein the process of controlling the output of the decoded video signal controls the output of the decoded video signal so that the decoded video signal is selectively outputted according to the reproduction speed.

11. The audio and video reproduction method according to

claim 8

, the method further comprising the process of calculating an audio time stamp of the decoded audio signal,

wherein the process of controlling the output of the decoded video signal controls the output of the decoded video signal so that the decoded video signal whose video time stamp is coincident with the calculated audio time stamp of the decoded audio signal is outputted in synchronism with the decoded audio signal.

12. The audio and video reproduction method according to

claim 11

, the method further comprising the process of calculating an address in a video memory corresponding to the video time stamp that is coincident with the calculated audio time stamp,

wherein the process of controlling the output of the decoded video signal controls the output of the decoded video signal so that the decoded video signal is outputted according to the calculated address in the video memory.

13. The audio and video reproduction method according to

claim 8

, the method further comprising the processes of:

decoding an audio signal in accelerating manner; and

decoding a video signal in accelerating manner.

14. The audio and video reproduction method according to

claim 8

, the method further comprising the processes of:

distributing contiguous GOPs configuring video signals to a plurality of decoding phase; and

decoding a video signal of distributed contiguous GOPs in each of a plurality of decoding phase.