Content Recording Medium, Content Recording Device and Content Playback Device

• US 20090087164A1
• Filed: 07/18/2008
• Published: 04/02/2009
• Est. Priority Date: 09/28/2007
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Chikahisa, Masaki, Sakao, Hideki
• Application Number:
  US12/175,741
• Publication Number:
  US 20090087164A1
• Time in Patent Office: Days
• US Class Current: 386/248
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: H04N 19/12 Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
• CPC Class Codes: H04N 19/156 Availability of hardware or computational resources, e.g. encoding based on power-saving criteria
• CPC Class Codes: H04N 19/40 using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream

Abstract

In playing back a content in a content recording medium, when two types of contents of the identical program are recorded on a content recording medium with respect to the capabilities of the device attempting to play back the content, that is to say, content A allowing video to be played back but not audio, and content B allowing audio to be played back but not video, playback is not possible even if it would be possible to play back the content using video data in the content A and audio data in the content B. In the content recording device, when a content is recorded on a content recording medium, a re-encoding condition list is recorded on the content recording medium. Further, the content playback device allows for playback suitable for the capability of the content playback device by selecting separately playback data that are suitable for the capability of the playback device from the re-encoding condition list.

Claims

1. A removable content recording medium, which has a content storage area for storing a content, and is inserted into a playback device to play back the content recorded on the content storage area, comprises a content information management area for storing a plurality of pieces of encoding information for encoding the content, in addition to the content storage area for storing the content.

2. The content recording medium according to claim 1, further comprising a playback device capability information management area for storing conditions allowing the playback device to play back the content.

3. The content recording medium according to claim 2, wherein the conditions allowing the playback device to play back the content comprise at least processing performance of a decoding processing unit, and performance of an output device.

4. The content recording medium according to any of claims 1 to 3, wherein the encoding information is re-encoding information for the encoded content.

5. The content recording medium according to any of claims 1 to 3, wherein the encoding information comprises at least information for associating a re-encoding parameter for video with a content, and information for associating a re-encoding parameter for audio with the content.

6. A content recording device for encoding and recording a content on a removable recording medium, comprising means for reading a plurality of replayable conditions, which have been registered with the recording medium in advance, at the time of recording the content, means for setting the conditions for encoding the content based on the read plurality of conditions, and means for recording encoding information of the encoded content on the recording medium.

7. A content recording device for re-encoding and recording a content on a removable recording medium, comprising means for reading a plurality of replayable conditions, which have been registered with the recording medium in advance, at the time of recording the content, means for setting the conditions for re-encoding the content based on the read plurality of conditions, and means for recording re-encoding information of the re-encoded content on the recording medium.

8. A content playback device for playing back a content from a removable recording medium, comprising means for reading a plurality of pieces of content encoding information, which have been registered with the recording medium in advance, at the time of playing back the content, means for determining image data and voice data that can be played back by the playback device based on the read plurality of pieces of information, and means for extracting the determined data from the content.

9. A content playback device for playing back a content from a removable recording medium, comprising means for reading a plurality of pieces of content re-encoding information, which have been registered with the recording medium in advance, at the time of playing back the content, means for determining image data and voice data that can be played back by the playback device based on the read plurality of pieces of information, and means for extracting the determined data from the content.