Data coding/decoding method and apparatus and coded data recording medium
First Claim
1. A method for recording picture data on a recording medium for special reproduction, comprising the steps of:
- receiving said picture data;
coding said picture data using intra-picture coding and predictive coding to provide a data stream containing at least one intra-picture coded picture data (I-picture), at least one bi-directional predictive coded picture (B-picture) and at least one predictive coded picture data (P-picture) in a predetermined order, wherein said at least one I-picture precedes said at least one P-picture;
generating positional information representing a data location with respect to said at least one I-picture and said at least one P-picture;
recording on said recording medium for special reproduction said at least one I-picture, said at least one B-picture and said at least one P-picture in an order in which the picture data is to be decoded during normal reproduction and said positional information; and
wherein said step of generating generates said positional information such that said at least one P-picture is detectable upon special reproduction on the basis of said positional information without a stream detector.
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Accused Products
Abstract
Apparatus and method of recording coded picture data on a recording medium which operates to receive the picture data (e.g., a video data), code the picture data using intra-picture coding and/or predictive coding to provide one I-picture and one succeeding P-picture, generate positional information representing the positions of the I-picture and the P-picture relative to the I-picture, and record the I-picture, the P-picture, and the positional information on the recording medium. The coded picture data is reproduced from the recording medium in a special reproduction mode by selectively reading the data using the positional information.
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Citations
62 Claims
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1. A method for recording picture data on a recording medium for special reproduction, comprising the steps of:
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receiving said picture data; coding said picture data using intra-picture coding and predictive coding to provide a data stream containing at least one intra-picture coded picture data (I-picture), at least one bi-directional predictive coded picture (B-picture) and at least one predictive coded picture data (P-picture) in a predetermined order, wherein said at least one I-picture precedes said at least one P-picture; generating positional information representing a data location with respect to said at least one I-picture and said at least one P-picture; recording on said recording medium for special reproduction said at least one I-picture, said at least one B-picture and said at least one P-picture in an order in which the picture data is to be decoded during normal reproduction and said positional information; and wherein said step of generating generates said positional information such that said at least one P-picture is detectable upon special reproduction on the basis of said positional information without a stream detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for recording picture data on a record medium, comprising:
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means for receiving said picture data; means for coding said picture data using intra-picture coding and predictive coding to provide a data stream containing at least one intra-picture coded picture data (I-picture), at least one bi-directional predictive coded picture (B-picture) and at least one predictive coded picture data (P-picture) in a predetermined order, wherein said at least one I-picture precedes said at least one P-picture; means for generating positional information representing a data location with respect to the data between said at least one I-picture and said at least one P-picture; means for recording said at least one I-picture, said at least one P-picture in an order in which the picture data is to be decoded and said positional information on said record medium; and wherein said means for generating generates said positional information such that said at least one P-picture is detectable upon special reproduction on the basis of said positional information without a stream detector. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of reproducing picture data from a recording medium, said picture data being recorded in an order in which the picture data is to be decoded during normal reproduction as a data stream representing groups of pictures (GOPs) with each GOP being composed of at least one intra-picture coded picture data (I-picture), at least one bi-directional predictive coded picture (B-picture) and at least one predictive coded picture data (P-picture), wherein said at least one I-picture precedes said at least one P-picture, said method comprising the steps of:
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reproducing said data stream; detecting positional information included in said data stream and representing a data location with respect to the data between said at least one I-picture and said at least one P-picture; detecting from said data stream said at least one I-picture and said at least one P-picture in response to said positional information and deriving coded picture data therefrom; decoding said coded picture data to provide decoded picture data; and wherein said step of detecting detects said P-picture during special reproduction on the basis of said positional information without a stream detector. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. Apparatus for reproducing picture data from a recording medium, said picture data being recorded in an order in which the picture data is to be decoded during normal reproduction as a data stream representing groups of pictures (GOPs) with each GOP being composed of at least one intra-picture coded picture data (I-picture), at least one bi-directional predictive coded picture (B-picture) and at least one predictive coded picture data (P-picture), wherein said at least one I-picture precedes said at least one P-picture, said apparatus comprising:
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means for reproducing said data stream recorded in said order; means for detecting positional information included in said data stream and representing a data location with respect to the data between said at least one P-picture and said at least one I-picture; means for detecting from said data stream said at least one I-picture and said at least P-picture in response to said positional information and deriving coded picture data therefrom; means for decoding said coded picture data to provide decoded picture data; and means for displaying said decoded picture data; and wherein said means for detecting detects said P-picture during special reproduction on the basis of said positional information without a stream detector. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A recording medium for use in conjunction with processor-controlled apparatus and having a coded picture data recorded thereon in an order in which the picture data is to be decoded during normal reproduction, said coded picture data comprising at least one intra-picture coded picture (I-picture), at least one bi-directional predictive coded picture (B-picture) and at least one predictive coded picture (P-picture), and positional information representing a data location with respect to the data between said at least one I-picture and said at least one P-picture, thereby enabling the processor-controlled apparatus to reproduce from the recording medium the coded picture data in a special reproduction mode by using the positional information to select the P-picture coded picture data;
- wherein said P-picture is detectable during special reproduction on the basis of said positional information without a stream detector.
- View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47)
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48. Apparatus for recording and reproducing picture data on a recording medium, comprising:
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means for receiving said picture data; means for coding said picture data using intra-picture coding and/or predictive coding to provide a data stream containing at least one intra-picture coded picture data (I-picture), at least one bi-directional predictive coded picture (B-picture) and at least one predictive coded picture data (P-picture) in a predetermined order, wherein said at least one I-picture precedes said at least one P-picture; means for generating positional information representing a data location with respect to the data between said at least one I-picture and said at least one P-picture; means for recording said at least one I-picture, said at least one P-picture and the positional information on said recording medium in an order in which the picture data is to be decoded during normal reproduction; means for reproducing said data stream from said recording medium recorded in said order; means for detecting said positional information from said reproduced data stream; means for detecting from said data stream said at least one I-picture and said at least one P-picture in response to said detected positional information and deriving coded picture data therefrom; means for decoding said coded picture data to provide decoded picture data; and means for displaying said decoded picture data; and wherein said means for detecting detects said P-picture during special reproduction on the basis of said positional information without a stream detector. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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Specification