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Information recording medium, apparatus and method for recording or reproducing data thereofRelated Patent Categories: Television Signal Processing For Dynamic Recording Or Reproducing, Processing Of Television Signal For Dynamic Recording Or Reproducing, Having Another Signal, Audio Signal, Multiplexing Or DemultiplexingInformation recording medium, apparatus and method for recording or reproducing data thereof description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080050095, Information recording medium, apparatus and method for recording or reproducing data thereof. Brief Patent Description - Full Patent Description - Patent Application Claims
[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 available can store several gigabytes. DVD-RAM media are already used in the computer industry, and commercialization of the MPEG and MPEG-2 digital AV data coding standards are expected to bring new uses for DVD-RAM media in the audio-video industry. [0006] A major area of interest is how to best use such large capacity optical discs to record image data and other AV data in ways that achieve significantly greater performance than conventional AV equipment and also offer new functionality. Furthermore, because AV equipment is not a personal computer, there are significant limitations in terms of how much memory can be provided. It is also necessary to provide an interface that is easy to use for users who are not computer literate, and that makes it possible to provide functions that are easy to understand and manipulate. [0007] Current DVD recorders record MPEG content using a program stream format. Digital broadcasting, however, uses a transport stream format, and it is therefore preferable to directly record content using the same transport stream format. The transport stream is intended for broadcasting and communications applications, and thus does not provide for randomly accessing the transport stream. In addition, transport stream data is already digital, and can therefore be recorded without an encoding process through the DVD recorder, as is needed to record a program 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. [0008] Moreover, data input using a transport stream may include data conforming to different standards and even non-standard data types. 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. SUMMARY OF THE INVENTION [0009] The present invention is directed to solving the aforementioned problems and an object of this invention is to provide an information recording medium for recording an MPEG transport stream which is lacking in the ability to access the stream at a random point, in conjunction with other AV streams so as to improve random accessibility. A further object of this invention is to provide an apparatus and method for recording information to and replaying or reproducing information from the information recording medium of the invention. [0010] In a first aspect of the invention, an information recording medium is provided which stores at least one object containing multiplexed encoded video data and encoded audio data, and management information for managing the one or more objects. The image data includes intra-coded picture data and inter-coded picture data. The management information includes map information for the at least one object, the map information managing the objects in blocks of a fixed length and correlating the presentation time of the video data multiplexed to the objects to the blocks, and the map information indicating which of the blocks constituting the object includes the leading data of the intra-coded picture data. [0011] In a second aspect of the invention, an information recording medium is provided which stores at least two objects containing multiplexed encoded video data and encoded audio data, and management information for managing the at least two objects. The video data includes intra-coded picture data and inter-coded picture data. The at least two objects include at least a first object and a second object. The first object is an object for which the location of intra-coded picture data in the object is managed by the management information. The second object is an object for which the location of intra-coded picture data in the object is not managed by the management information. The management information is information for separately managing the first object and the second object, and includes map information for each first object, and the map information correlates a playback time of the corresponding first object with the location of intra-coded picture data included in the object. [0012] In a third aspect of this invention, a recording apparatus is provided for recording information to the information recording medium described above. The information recording apparatus comprises an interface for inputting the object from an external part, a generating section for generating management information corresponding to the input object, and a recording section for recording the object and the management information to the information recording medium. The generating section includes a detection section for determining if a block contained in the input object includes intra-coded picture data, and a producing section for producing the management information containing map information based on the result from the detection section. [0013] In a fourth aspect of this invention, a reproducing apparatus is provided for reproducing data from the information recording medium described above. The apparatus comprises a playback section for reading and reproducing the object and management information from the information recording medium, a user interface for receiving an instruction specifying the object to play back, and an instruction specifying a playback time for starting playback of the object, and a controller for controlling the playback section. When the specified object is a first object, the controller controls the playback section so as to identify picture data which is included in the specified object and corresponds to the specified playback time based on the map information of the management information, and begin the playback from the identified picture data. ADVANTAGES OF THE INVENTION [0014] The information recording medium of the invention enables the transport stream received from digital broadcast media to be recorded with other AV streams while also enabling the recorded digital broadcast object to be reproduced with random access to object content. Information for identifying the validity of the flag indicating the inclusion of intra-coded pictures (I-pictures) is also provided in the management information used to manage the stream. This enables even recorders that are unable to analyze the stream but can record the transport stream to record the transport stream in a way that enables the recorded information to be played back with no problems. [0015] The recording apparatus and method of this invention can thus record a transport stream received via digital broadcast to an information recording medium in a manner enabling the recorded transport stream to be randomly accessed during playback. [0016] The reproducing apparatus and method of this invention can also randomly access a transport stream received via digital broadcast media and recorded to the information recording medium with other AV streams. BRIEF DESCRIPTION OF THE DRAWINGS [0017] FIG. 1 shows the relationship between media and AV devices which are targeted by a DVD recorder according to the present invention; [0018] FIG. 2 is a block diagram of the drive device in the DVD recorder shown in FIG. 1; [0019] FIG. 3A shows the address space on a disc, and [0020] FIG. 3B shows the accumulation of data in the track buffer; Continue reading about Information recording medium, apparatus and method for recording or reproducing data thereof... Full patent description for Information recording medium, apparatus and method for recording or reproducing data thereof Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Information recording medium, apparatus and method for recording or reproducing data thereof patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Information recording medium, apparatus and method for recording or reproducing data thereof or other areas of interest. ### Previous Patent Application: Recording medium, recording method, reproduction apparatus and method, and computer-readable program Next Patent Application: Moving image reproducing apparatus Industry Class: Television signal processing for dynamic recording or reproducing ### FreshPatents.com Support Thank you for viewing the Information recording medium, apparatus and method for recording or reproducing data thereof patent info. IP-related news and info Results in 0.25439 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf 174 |
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