VIDEO AUDIO RECORDING/PLAYBACK APPARATUS AND METHOD

• US 20110013882A1
• Filed: 07/16/2010
• Published: 01/20/2011
• Est. Priority Date: 07/17/2009
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: KUSUNOKI, Yoshiaki, Kitahara, Youhei, Shimada, Masaaki
• Granted Patent: US 8,639,089 B2
• Time in Patent Office: Days
• US Class Current: 386/241
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4394 involving operations for analysing the audio stream, e.g. detecting features or characteristics in audio streams arrangements characterised by components specially adapted for monitoring, identification or recognition of audio in broadcast systems H04H60/58
• CPC Class Codes: H04N 21/44008 involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73
• CPC Class Codes: H04N 21/8455 involving pointers to the content, e.g. pointers to the I-frames of the video stream
• CPC Class Codes: H04N 5/46 for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal
• CPC Class Codes: H04N 9/8227 the additional signal being at least another television signal

Abstract

During video audio recording, key frames are temporarily stored from the video audio stream to be recorded, and metadata is later generated from the temporarily stored key frames. Even if a CPU or system configuration of a relatively low performance is used, metadata generation can be carried out in parallel with the video recording operation.

Claims

1. A video audio recording/playback apparatus comprising:

a video audio storage for recording video audio data;

an input stream controller for temporarily storing the video audio data, and transferring the video audio data stably to the video audio storage;

a key frame extractor for extracting key frames from the input stream controller;

a key frame temporary storage for storing the key frames extracted by the key frame extractor while the video audio data are recorded; and

a metadata generator for generating metadata from the key frames stored in the key frame temporary storage.

2. The video audio recording/playback apparatus of claim 1, further comprising:

a metadata recorder/reader for performing recording and reading of the metadata generated by the metadata generator.

3. The video audio recording/playback apparatus of claim 1, wherein the key frame temporary storage is formed of a non-volatile medium.

4. The video audio recording/playback apparatus of claim 1, wherein the key frames stored in the key frame temporary storage are deleted when the video recording ends.

5. The video audio recording/playback apparatus of claim 1, wherein the key frame temporary storage is formed of the same medium as the video audio storage.

6. The video audio recording/playback apparatus of claim 1, further comprising a key frame extraction controller for controlling the number of key frame extractions or the timing of key frame extraction by the key frame extractor.

7. The video audio recording/playback apparatus of claim 6, further comprising:

a video audio analyzer for analyzing the characteristic values of the video audio data;

wherein the timing of the key frame extraction by the key frame extractor is determined based on the result of the analysis by the video audio analyzer.

8. The video audio recording/playback apparatus of claim 1, further comprising:

a metadata generation controller for controlling the timing of the metadata generation and the number of metadata generations.

9. The video audio recording/playback apparatus of claim 8, wherein

the metadata generation controller determines the timing of the metadata generation based on the characteristic values of the video audio data.

10. The video audio recording/playback apparatus of claim 9, wherein

the key frame temporary storage has a single key frame data for each video audio data.

13. The video audio recording/playback method of claim 1, further comprising the step of:

performing recording and reading of the metadata generated by the metadata generator.

11. A video audio recording/playback apparatus comprising:

a video audio storage for recording video audio data;

a decoding processor for decoding the video audio data;

an output controller for reading the video audio data from the video audio storage and transferring the video audio data to the decoding processor;

a key frame extractor for extracting key frames from the video audio data read by the output stream controller;

a key frame temporary storage for storing the key frames extracted by the key frame extractor while the video audio data is played back; and

a metadata generator for generating metadata from the key frames stored in the key frame temporary storage.

12. A video audio recording/playback method comprising the steps of:

recording video audio data in a video audio storage for;

temporarily storing the video audio data in an input stream controller, and transferring the video audio data stably to the video audio storage;

extracting key frames from the input stream controller;

storing the extracted key frames in a key frame temporary storage while the video audio data are recorded; and

generating metadata from the key frames stored in the key frame temporary storage.

14. The video audio recording/playback method of claim 12, wherein the key frame temporary storage is formed of a non-volatile medium.

15. The video audio recording/playback method of claim 12, further comprising the step of deleting the key frames stored in the key frame temporary storage when the video recording ends.

16. The video audio recording/playback method of claim 12, further comprising the step of:

controlling the number of key frame extractions or the timing of key frame extraction by the key frame extracting step.

17. The video audio recording/playback method of claim 16, further comprising the step of analyzing the characteristic values of the video audio data;

wherein the timing of the key frame extraction by the key frame extracting step is determined based on the result of the analysis by the video audio analyzing step.

18. The video audio recording/playback method of claim 12, further comprising step of controlling the timing of the metadata generation and the number of metadata generations.

19. The video audio recording/playback method of claim 18, further comprising the step of determining the timing of the metadata generation based on the characteristic values of the video audio data.

20. The video audio recording/playback method of claim 19, wherein

said key frame temporarily recording step processes a single key frame data for each video audio data.