Data coding/decoding method and apparatus and coded data recording medium
AssigneeSony Corporation
InventorMakoto Kawamura
Life of this patent
Estimating the term…
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.
Claims62
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.
An apparatus for recording picture data on a record medium, comprising:
- 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.
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:
- 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.
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:
- 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.
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.
Apparatus for recording and reproducing picture data on a recording medium, comprising:
- 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.
Dependencies are inferred from the claim text.