Data processing apparatus for controlling video recording and video quality

• US 20050111832A1
• Filed: 10/07/2004
• Published: 05/26/2005
• Est. Priority Date: 10/08/2003
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Okauchi, Osamu, Nakamura, Kazuhiko, Ohara, Shunji
• Application Number:
  US10/960,603
• Publication Number:
  US 20050111832A1
• Time in Patent Office: Days
• US Class Current: 386/241
• CPC Class Codes: G11B 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/2575 DVD-RAMs
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 7/0112 one of the standards corresponding to a cinematograph film standard
• CPC Class Codes: H04N 9/7921 for more than one processing mode
• 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 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

A data processing apparatus can write a video stream related to video on a recording medium. The data processing apparatus includes: a signal acquisition section for acquiring a video signal related to the video; a type identification section for identifying a type of the video based on the video signal, the type of the video being determined in accordance with picture counts of the video displayed per unit time; a stream generator for generating a video stream based on the video signal; a controller for determining, based on the type of the video, whether to disable the writing of the video stream or to enable the writing of the video stream with lowered video quality; and a writing section for controlling, based on the decision of the controller, the writing of the video stream to the recording medium.

Claims

1. A data processing apparatus for writing a video stream related to video on a recording medium, comprising:

a signal acquisition section for acquiring a video signal related to the video;

a type identification section for identifying a type of the video based on the video signal, the type of the video being determined in accordance with picture counts of the video displayed per unit time;

a stream generator for generating a video stream based on the video signal;

a controller for determining, based on the type of the video, whether to disable the writing of the video stream or to enable the writing of the video stream with lowered video quality; and

a writing section for controlling, based on the decision of the controller, the writing of the video stream to the recording medium.

2. The data processing apparatus of claim 1, wherein the controller disables the writing of the video stream in the case where the type of the video is a movie.

3. The data processing apparatus of claim 1, further comprising an adjustment section for selecting a video quality based on the type of the video, wherein the stream generator generates the video stream with selected video quality.

4. The data processing apparatus of claim 3, wherein in the case where the type of the video matches a predetermined type, the controller determines to enable the writing of the video stream with lowered video quality, and wherein the adjustment section selects video quality lower than that set in advance.

5. The data processing apparatus of claim 3, wherein in the case where the type of the video does not match a predetermined type, the controller determines to enable the writing of the video stream with the video quality preserved, and the adjustment section selects the same video quality as set in advance.

6. The data processing apparatus of claim 3, wherein the adjustment section selects the video quality in relation to a resolution.

7. The data processing apparatus of claim 1, wherein the type identification section includes:

a detection section for continuously receiving the video signal and for detecting whether first and second images consisting of each picture of the video, match or mismatch; and

a judgement section for judging the type of the video based on the detection result.

8. The data processing apparatus of claim 7, wherein the detection section includes:

a first memory for storing data of the first image;

a second memory for storing data of the second image; and

a comparator for comparing the data in the first memory with that in the second memory, the comparator detecting whether the first and second images match each other.

9. The data processing apparatus of claim 7, wherein the judgement section continuously receives each detection result and specifies the type of the video based on a pattern of match and mismatch appeared in the each detection result.

10. The data processing apparatus of claim 6, further comprising a management information generator for generating judgement information indicating at which of a first resolution and a second resolution lower than the first resolution the video was encoded, the management information generator managing the judgement information in association with the video stream, wherein the writing section further writes the judgement information to the recording medium.

11. The data processing apparatus of claim 10,

wherein the management information generator manages a plurality of contents, each of which including a pair of the judgement information and the video stream associated with each other,

the data processing apparatus further comprising a management file generator for extracting the judgement information from each content and generating a content management file having entries for each content.

12. A data processing apparatus for reading out a video stream related to video from a recording medium to output a video signal,

wherein the video stream and management information are written on the recording medium, and

wherein the management information contains judgement information indicating the video being encoded in first video quality and second video quality lower than the first video quality,

the data processing apparatus comprising:

a readout section for reading out the video stream and the management information from the recording medium;

an extraction section for extracting the judgement information from the management information and for generating, based on the judgement information, quality display data indicating at which of the first video quality and the second video quality the video was encoded;

a decoder for decoding the video stream to generate a video signal; and

an output section for outputting the quality display data and the video signal in correspondence with each other.

13. The data processing apparatus of claim 12,

wherein in the case where the type of the video matches a predetermined type, the judgement information indicates that the video was encoded at the second video quality, and

wherein in the case where the type of the video does not match a predetermined type, the judgement information indicates that the video was encoded at the first video quality.

14. The data processing apparatus of claim 13, further comprising a superimposing processor for superimposing the quality display data on the video signal, wherein the output section outputs the video signal superimposed with the quality display data.

15. The data processing apparatus of claim 13, wherein the output section includes a video signal output section for outputting the video signal and a display output section for displaying the quality display data.

16. The data processing apparatus of claim 12,

wherein a plurality of contents are stored on the recording medium, each of which including a pair of the judgement information and the video stream associated with each other,

wherein each piece of the judgement information is stored in a content management file having an entry for each piece of the content, and wherein the extraction section extracts the judgement information from the content management file to generate list data for displaying content corresponding to each entry and the quality display data in correspondence with each other.

17. A data processing method for writing a video stream related to video on a recording medium, comprising steps of:

acquiring a video signal related to the video;

identifying a type of the video based on the video signal, the type of the video being determined in accordance with picture counts of the video displayed per unit time;

generating a video stream based on the video signal;

determining, based on the type of the video, whether to disable the writing of the video stream or to enable the writing of the video stream with lowered video quality; and

controlling, based on the determination, the writing of the video stream to the recording medium.

18. The data processing method of claim 17, wherein the step of determining determines to disable the writing of the video stream in the case where the type of the video is a movie.

19. The data processing method of claim 17, further comprising a step of selecting a video quality based on the type of the video, wherein the steps of generating generates the video stream with selected video quality.

20. The data processing method of claim 19, wherein in the case where the type of the video matches a predetermined type, the step of determining determines to enable the writing of the video stream with lowered video quality, and wherein the step of selecting selects video quality lower than that set in advance.