DIGITAL VIDEO PLAYBACK APPARATUS AND METHOD

• US 20010022887A1
• Filed: 10/28/1997
• Published: 09/20/2001
• Est. Priority Date: 11/28/1996
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, HEE-SOO
• Granted Patent: US 6,594,444 B2
• Time in Patent Office: Days
• US Class Current: 386/46
• CPC Class Codes: H04N 5/9205 the additional signal being at least another television signal
• CPC Class Codes: H04N 5/9265 with processing of the sound signal

Abstract

A digital video playback apparatus which selectively reproduces video signals that are recorded by using a plurality of cameras each at different angles and method therefor. The digital video playback apparatus reads out first and second video steam data and first and second audio stream data, which are compressed and recorded on a recording medium. A demultiplexer separates a signal output of the digital playback apparatus into system information, the first and second video stream data, and the first and second audio stream data. First and second video decoders expand the first and second compressed video stream data outputs, respectively. First and second audio decoders decode the first and second audio stream data outputs from the demultiplexer and expand the first and second audio stream data decoded into original 4-channel audio signals, respectively. A key input section generates first and second angle selection signals. A controller analyzes the system information, and generates a switching control signal. First and second switches selects the first and second video and audio stream data according to the switching control signal.

Claims

1. A digital video playback apparatus to read out video stream data and audio stream data which are compressed and recorded on a recording medium, the digital video playback apparatus comprising:

a digital playback apparatus to read out the compressed video steam data and the compressed audio stream data from the recording medium, and to error correct and deinterleave the video and audio stream data;

a demultiplexer to separate a signal output of said digital playback apparatus into system information, the compressed video stream data recorded from a plurality of different angles, and the compressed audio stream data recorded from the plurality of different angles;

a plurality of video decoders to respectively expand the compressed video stream data recorded from the plurality of different angles from said demultiplexer;

a plurality of audio decoders to respectively decode the compressed audio stream data recorded from the plurality of different angles from said demultiplexer and to respectively expand the decoded audio stream data into original 4-channel audio data;

a key input section to generate a plurality of angle selection signals indicative of the corresponding angles;

a controller to analyze said system information from the demultiplexer and to generate a switching control signal indicative of the video data stream from one of the plurality of video decoders and the audio stream from one of the plurality of audio decoders in response to one of the plurality of angle selection signals selected by a user at said key input section; and

a plurality of switches to select the video stream data from the one of the plurality of video decoders and the audio stream data from the one of the plurality of audio decoders, according to said switching control signal.

2. A digital video playback apparatus according to

claim 1

, wherein said system information comprises a number of the angles, a number of video blocks, a number of audio blocks, a start address for each video block, and a start address for each audio block.

3. A digital video playback apparatus to read out first and second video stream data and first and second audio stream data which are compressed and recorded on a recording medium, the digital video playback apparatus comprising:

a digital playback apparatus to read out the first and second video steam data and the first and second audio stream data from the recording medium, and to error correct and deinterleave the first and second video and audio stream data;

a demultiplexer to separate a signal output of said digital playback apparatus into system information, the compressed first and second video stream data, and the compressed first and second audio stream data;

first and second video decoders to expand the first and second compressed video stream data outputs from said demultiplexer, respectively;

first and second audio decoders to decode the first and second audio stream data outputs from said demultiplexer, and to expand the first and second audio stream data decoded into original 4-channel audio signals, respectively;

a key input section to generate first and second angle selection signals;

a controller to analyze said system information from the demultiplexer and to generate a switching control signal indicative of one of the first and second video stream data from said first and second decoders, respectively, and one of the first and second audio stream data from said first and second audio decoders, respectively, in response to one of the first and second angle selection signals selected by a user at said key input section; and

a first switch to select one of the first and second video stream data from said first and second video decoders, respectively, and a second switch to select one of the first and second audio stream data from said first and second audio decoders, respectively, according to said switching control signal.

4. A digital video playback apparatus according to

claim 3

, wherein said system information comprises a number of the angles, a number of video blocks, a number of audio blocks, a start address for each video block, and a start address for each audio block.

5. A digital video playback apparatus to reproduce a digital data stream recorded on a recording medium, wherein the data stream includes data recorded from a plurality of different angles, the digital video playback apparatus comprising:

a digital playback device to read out the data stream from the recording medium; and

a reproducer to reproduce the data of one of the angles based upon a selection indicator from a user.

6. A digital video playback apparatus as claimed in

claim 5

, wherein:

the data stream includes system information, video data and corresponding audio data for each of the plurality of different angles;

said digital playback device error correcting and deinterleaving the data stream; and

said reproducer reproducing the video and corresponding audio data of the one of the angles based upon the selection indicator and the system information.

7. A digital video playback apparatus as claimed in

claim 5

, wherein:

the data stream includes system information, video data and corresponding audio data for each of the plurality of different angles; and

said reproducer includes

a processing unit to separate the system information, video data and audio data of each of the plurality of different angles from each other, and to decode the video data and the audio data of each of the plurality of different angles, and

a selector unit to output the decoded video data and corresponding audio data of the one of the plurality of different angles based upon the selection indicator.

8. A digital video playback apparatus as claimed in

claim 7

, wherein the video and audio data are compressed as recorded on the recording medium, and said processing unit comprises:

a demultiplexer to separate the system information, video data and audio data of each of the plurality of different angles from each other;

a plurality of video decoders to expand the compressed video data for each of the plurality of different angles, respectively; and

a plurality of audio decoders to expand the compressed audio data for each of the plurality of different angles, respectively.

9. A digital video playback apparatus as claimed in

claim 7

, wherein said selector unit comprises:

a key input selector to generate an angle selection signal based upon the selection indicator by the user of the one of the angles;

a controller to generate a switching control signal based upon the angle selection signal;

a first switch to selectively transmit the decoded video data of the one of the angles; and

a second switch to selectively transmit the decoded audio data of the one of the angles.

10. A digital video playback apparatus as claimed in

claim 8

, wherein said selector unit comprises:

a key input selector to generate an angle selection signal based upon the selection indicator by the user of the one of the angles;

a controller to generate a switching control signal based upon the angle selection signal;

a first switch connected to each of the plurality of video decoders, to selectively transmit the decoded video data of the one of the angles; and

a second switch connected to each of the plurality of audio decoders, to selectively transmit the decoded audio data of the one of the angles.

11. A digital video playback apparatus as claimed in

claim 8

, wherein:

said demultiplexer outputs an angle number signal indicative of a number of the angles of the video and audio data from the system information; and

said selector unit includes

a key input selector to generate an angle selection signal based upon the selection indicator by the user of the one of the angles,

a controller to generate a switching control signal based upon the angle number signal and the angle selection signal,

a first switch connected to each of the plurality of video decoders, to selectively transmit the decoded video data of the one of the angles based upon the switching control signal, and

a second switch connected to each of the plurality of audio decoders, to selectively transmit the decoded audio data of the one of the angles based upon the switching control signal;

said switching control signal generating the switching control signal to automatically cause the first and second switches to be in a given state to transmit the video and audio data of a particular angle if the angle number signal indicates the number of angles to be one, and otherwise generates the switching control signal to cause the first and second switches to transmit the video and audio data of the one angle based upon the angle selection signal.

12. A digital video playback apparatus as claimed in

claim 7

, wherein the data stream recorded on the recording medium includes the system information, the video data for each of the plurality of different angles and the audio data for each of the plurality of different angles in that order, and said digital playback device reads out the data stream from the recording medium in that order.

13. A digital video playback apparatus as claimed in

claim 8

, wherein the data stream recorded on the recording medium includes the system information, the video data for each of the plurality of different angles and the audio data for each of the plurality of different angles in that order, and said digital playback device reads out the data stream from the recording medium in that order.

14. A digital video playback apparatus as claimed in

claim 8

, wherein each of the plurality of audio decoders expands the compressed audio data to 4-channel audio data.

15. A digital video recording apparatus to record a digital data stream of data from a plurality of different angles on a recording medium, the digital video recording apparatus comprising:

a data stream generator to generate the data stream from the data received from the plurality of different angles; and

a digital recording device to record the data stream on the recording medium

16. A digital video recording apparatus as claimed in

claim 15

, wherein said data stream generator comprises:

a plurality of video encoders and a plurality of audio decoders, wherein each of the plurality of video encoders receives and encodes the video data of a respective one of the plurality of different angles, and each of the plurality of audio encoders receives and encodes the audio data of a respective one of the plurality of different angles; and

a multiplexer to combine the video and audio data of the different angles from each of the audio and video encoders, along with system information of the video and audio data, to generate the data stream.

17. A digital video playback apparatus as claimed in

claim 16

, wherein said multiplexer arranges the data stream in the order of the system information, the video data for each of the plurality of different angles and the audio data for each of the plurality of different angles.

18. A digital video playback apparatus as claimed in

claim 15

, wherein each of the plurality of audio encoders changes the audio data of the corresponding different angles from 4-channel audio data to a single audio data stream.

19. A method of reproducing a digital data stream recorded on a recording medium, wherein the data stream includes system information and data recorded from a plurality of different angles, comprising the steps of:

reading the data stream from the recording medium;

separating the system information, the data for each of the plurality of different angles from each other; and

selecting the system information and the data for one of the plurality of different angles.

20. A method as claimed in

claim 19

, wherein said step of selecting the system information comprises the steps of:

determining a number of the angles from the separated system information; and

automatically selecting the data for one angle if the number of angles is one, and otherwise selecting the data for the one of the plurality of different angles based upon an input from a user.

21. A method as claimed in

claim 19

, wherein the data includes video data and corresponding audio data for each of the plurality of different angles, said method further comprising the step of:

decoding the video and audio data for each of the different angles;

wherein the step of automatically selecting the data further comprises the step of controlling switches to selectively enable transmission of the video and audio data for the one angle or the one of the plurality of different angles.