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Information recording medium, apparatus and method for recording or reproducing data thereof

a technology of information recording medium and data, applied in the field of information recording, can solve the problems of not providing random access to the transport stream, significant limitations in the amount of memory available, and one of the greatest features of disc media, and cannot be achieved insufficiently

Inactive Publication Date: 2008-02-21
OKADA TOMOYUKI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables the recording and playback of MPEG transport streams with random access capabilities, ensuring accurate playback of digital broadcast content even when recorded by devices that cannot analyze the stream, thereby improving user experience and functionality.

Problems solved by technology

Furthermore, because AV equipment is not a personal computer, there are significant limitations in terms of how much memory can be provided.
The transport stream is intended for broadcasting and communications applications, and thus does not provide for randomly accessing the transport stream.
A problem with storing a transport stream of this type to an optical disc or other medium is that random access, one of the greatest features of disc media, cannot be sufficiently achieved.
In such cases, the DVD recorder may not be able to determine the location of an intra-coded picture, or the identified address may have been recorded containing errors.
A problem in this case is that when such data is replayed, data at the location of the intra-coded picture may contain errors, and normal playback may not be possible.

Method used

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  • Information recording medium, apparatus and method for recording or reproducing data thereof
  • Information recording medium, apparatus and method for recording or reproducing data thereof
  • Information recording medium, apparatus and method for recording or reproducing data thereof

Examples

Experimental program
Comparison scheme
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first embodiment

(1. DVD Recorder System Concept)

[0052]FIG. 1 shows an exemplary interface between a DVD recorder and peripheral equipment used with the DVD recorder.

[0053] As shown in FIG. 1, a DVD disc which is just one type of optical disc is loaded into the DVD recorder for recording / reproducing video data to / from the disc. The operation of the DVD recorder is generally done using a remote control unit.

[0054] Video data can be input to a DVD recorder as an analog or digital signal. Analog broadcasts use analog signals, and digital broadcasts use digital signals. Analog broadcasts are generally received and demodulated by a receiver, such as one built in to a television, and then input to the DVD recorder as an analog video signal in the NTSC format, for example. Digital broadcasts are demodulated into a digital signal by a STB (Set Top Box) which serves as a receiver, and then input to the DVD recorder for recording.

[0055] On the other hand, video data recorded to a DVD disc is played back ...

second embodiment

[0196] The second embodiment of the present invention is described next below using exemplarily DVD recorder and DVD-RAM media.

[0197] The basic configuration and operation of a DVD recorder and DVD-RAM media in this embodiment are the same as described above in the first embodiment. Further description thereof is thus omitted below. The following description focuses particularly on the structure of the access map for a digital broadcast object (D_VOB) which is of a data object type used for digital broadcasts.

(Pcr Map and Pts Map)

[0198] An access map in this embodiment of the invention is shown in FIG. 22A and described below. As shown in FIG. 22A, access map 86c has two map layers, PCR map 811 and PTS map 813.

[0199] When recording a digital broadcast object (D_VOB) to disc, the stream is recorded referenced to the ECC block. This means that stream recording always starts from the leading sector in the ECC block.

[0200] The access map manages objects in block units containing a...

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PUM

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Abstract

An information recording medium stores information transmitted as a transport stream as objects. The management information written to the information recording medium includes object information for managing the recorded objects. The object information includes an access map. The access map manages the MPEG transport stream in block units, each block containing an integer multiple number of ECC blocks. In addition to the specific information for accessing the blocks, the access map also includes an I-picture Included Flag indicating whether each block includes I-picture data. It is therefore possible to randomly access the transport stream, which otherwise lacks random accessibility to the middle of the stream.

Description

[0001] The present application is a divisional application of application Ser. No. 09 / 836,292, filed Apr. 18, 2001, which is a continuation in part application of application Ser. No. 09 / 443,498 by Okada et al., filed on Nov. 19, 1999 in the United States, the content of which is incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates generally to a readable / writable information recording medium. More specifically, the invention relates to an information recording medium for recording multimedia data containing information in different kinds of formats, including moving picture data, still picture data, and audio data; and to an apparatus and method for recording data to and replaying data from the information recording medium. [0004] 2. Description of Related Art [0005] While the maximum storage capacity of rewritable optical disc media was recently 650 MB, phase-change type DVD-RAM media that are now availa...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/26H04N5/85G11B20/12G11B27/00G11B27/034G11B27/10G11B27/32G11B27/34H04N5/765H04N5/775H04N5/91H04N5/92H04N9/79H04N9/804H04N9/806H04N9/888
CPCG11B20/1262H04N9/888G11B27/034G11B27/105G11B27/329G11B27/34G11B2020/10537G11B2220/216G11B2220/2545G11B2220/2562G11B2220/2575G11B2220/2583G11B2220/41H04N5/765H04N5/775H04N5/85H04N9/7921H04N9/804H04N9/8042H04N9/8063G11B27/005
Inventor OKADA, TOMOYUKIMURASE, KAORUTSUGA, KAZUHIRO
Owner OKADA TOMOYUKI