EP0756281A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Data coding/decoding method and apparatus and coded data recording medium
Assignee: Sony Corp
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Filing: 1996-07-29
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Granted: —
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Expires: 2016-07-29
Abstract
Abstract Apparatus for recording coded picture data on a recording medium receive the picture data (e.g., a video data), codes (101) the picture data using intra-frame coding and predictive coding to provide a group of pictures (GOP) which includes one I-picture and two succeeding P-pictures, generates (155) positional information (PSM) representing the positions of the two P-pictures relative to the I-picture, and records (154) the GOP including the I-picture, the two P-pictures, and the positional information (PSM) on the recording medium (160). The coded picture data maybe reproduced from the recording medium in a special reproduction mode in which data relates to the I-picture and 2 P-pictures is selectively read using the positional information (40, PSM).
Inventors
- 👤 Makoto Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:58
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; G; G11; G11B; G11B20/00; G11B20/10; G06; G06T; G06T9/00; G06T9/004; G11B27/00; G11B27/005; G11B27/02; G11B27/031; G11B27/034; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/32; G11B27/327; G11B27/329; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/783; G11B20/12; G11B20/1217; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537; G11B2220/2545; G11B2220/2554; G11B2220/2562; H04N5/84; H04N5/85; H04N9/806; H04N9/8063; H04N9/82; H04N9/8205; H04N9/8233; H04N9/87; H04N9/877
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
115 words
A method of recording picture data on a recording medium, 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) 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 positions of said at least one I-picture and said at least one P-picture relative to said at least one I-picture in said data stream; and recording said at least one I-picture, said at least one P-picture and said positional information on said record medium.
Claim 2
Dependent Claim
34 words
The method of claim 1, wherein the step of generating positional information includes generating positional information representing data length from said at least one I-picture to the end of said at least one P-picture.
Claim 3
Dependent Claim
61 words
The method of claim 2, wherein the step of recording records said at least one I-picture and said at least one P-picture in a sector; and wherein the step of generating positional information further includes generating positional information representing data length from beginning of said sector including said at least one I-picture to the end of said at least one P-picture.
Claim 4
Dependent Claim
18 words
The method of claim 3, wherein the step of recording includes recording said positional information in said sector.
Claim 5
Dependent Claim
31 words
The method of claim 4, wherein the step of coding includes bidirectionally predictive coding the picture data to provide a plurality of bidirectionally predictive coded pictures (B-picture) in said data stream.
Claim 6
Dependent Claim
22 words
The method of claim 4, wherein each of said at least one I-picture and said at least one P-picture constitutes a frame.
Claim 7
Dependent Claim
45 words
The method of claim 2, wherein the data stream contains two P-pictures; and wherein the step of generating positional information further includes generating positional information representing the data length from said at least one I-picture to the end of a second of said two P-pictures.
Claim 8
Independent Claim
120 words
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) 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 positions of said at least one I-picture and said at least one P-picture relative to said at least one I-picture in said data stream; and means for recording said at least one I-picture, said at least one P-picture and said positional information on said record medium.
Claim 9
Dependent Claim
34 words
The apparatus of claim 8, wherein said means for generating is operable to generate positional information representing data length from said at least one I-picture to the end of said at least one P-picture.
Claim 10
Dependent Claim
64 words
The apparatus of claim 9, wherein said means for recording is operable to record said at least one I-picture and said at least one P-picture in a sector; and wherein said means for generating is operable to generate positional information further representing data length from beginning of said sector including said at least one I-picture to the end of said at least one P-picture.
Claim 11
Dependent Claim
20 words
The apparatus of claim 10, wherein said means for recording is operable to record said positional information in said sector.
Claim 12
Dependent Claim
38 words
The apparatus of claim 11, wherein said means for coding is operable to code the picture data using bidirectionally predictive coding the picture data to provide a plurality of bidirectionally predictive coded pictures (B-picture) in said data stream.
Claim 13
Dependent Claim
22 words
The apparatus of claim 11, wherein each of said at least one I-picture and said at least one P-picture constitutes a frame.
Claim 14
Dependent Claim
45 words
The apparatus of claim 9, wherein the data stream contains two P-pictures; and wherein said means for generating is further operable to generate positional information representing the data length from said at least one I-picture to the end of a second of said two P-pictures.
Claim 15
Independent Claim
147 words
A method of reproducing picture data from a recording medium, said picture data being recorded 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) 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 positions of said at least one I-picture and said at least one P-picture relative to said at least one I-picture in said data stream; 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 displaying said decoded picture data.
Claim 16
Dependent Claim
33 words
The method of claim 15, wherein the step of detecting positional information includes detecting positional information representing data length from said at least one I-picture to the end said at least one P-picture.
Claim 17
Dependent Claim
51 words
The method of claim 16, wherein the step of reproducing reproduces said data stream from a sector; and wherein the step of detecting further includes detecting positional information representing data length from beginning of said sector including said at least one I-picture to the end of said at least one P-picture.
Claim 18
Dependent Claim
14 words
The method of claim 17, wherein said positional information is recorded in said sector.
Claim 19
Dependent Claim
45 words
The method of claim 16, wherein the data stream contain two P-pictures; and wherein the step of detecting positional information further includes detecting positional information representing the data length from said at least one I-picture to the end of a second of said two P-pictures.
Claim 20
Dependent Claim
150 words
Apparatus for reproducing picture data from a recording medium, said picture data being recorded 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) 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: a picture data, comprising: means for reproducing said data stream means for detecting positional information included in said data stream and representing positions of said at least one P-picture relative to said at least one I-picture in said data stream; 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.
Claim 21
Dependent Claim
34 words
The apparatus of claim 20, wherein said means for detecting is operable to detect positional information representing data length from said at least one I-picture to the end of said at least one P-picture.
Claim 22
Dependent Claim
59 words
The apparatus of claim 21, wherein said means for reproducing is operable to reproduce said data stream from a sector; and wherein said means for detecting said positional information is further operable to detect positional information representing data length from beginning of said sector including said at least one I-picture to the end of said at least one P-picture.
Claim 23
Dependent Claim
14 words
The apparatus of claim 22, wherein said positional information is recorded in said sector.
Claim 24
Dependent Claim
25 words
The apparatus of claim 23, wherein said coded picture data in the reproduced data stream includes a plurality of bidirectionally predictive coded picture data (B-pictures).
Claim 25
Dependent Claim
22 words
The apparatus of claim 23, wherein each of said at least one I-picture and said at least one P-picture constitutes a frame.
Claim 26
Dependent Claim
45 words
The apparatus of claim 21, wherein the data stream contains two P-pictures; and wherein said means for detecting is further operable to detect positional information representing the data length from said at least one I-picture to the end of a second of said two P-pictures.
Claim 27
Dependent Claim
95 words
A recording medium for use in conjunction with processor-controlled apparatus and having a coded picture data recorded thereon, said coded picture data comprising at least one intra-picture coded picture (I-picture), and at least one predictive coded picture (P-picture), and positional information representing respective positions of said at least one I-picture and said at least one P-picture relative to said at least one I-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.
Claim 28
Dependent Claim
28 words
The recording medium of claim 27, wherein said positional information represents data length from said at least one I-picture to the end of said at least one P-picture.
Claim 29
Dependent Claim
45 words
The recording medium of claim 28, wherein said coded picture data is recorded in a sector; and wherein said positional information further represent data length from beginning of said sector including said at least one I-picture to the end of said at least one P-picture.
Claim 30
Dependent Claim
15 words
The recording medium of claim 29, wherein said positional information is recorded in said sector.
Claim 31
Dependent Claim
20 words
The recording medium of claim 30, wherein said coded picture data includes a plurality of bidirectionally predictive coded pictures (B-pictures).
Claim 32
Dependent Claim
23 words
The recording medium of claim 30, wherein each of said at least one I-picture and said at least one P-picture constitutes a frame.
Claim 33
Dependent Claim
40 words
The recording medium of claim 28, wherein the coded picture data comprises two P-pictures; and wherein said positional information further represents the data length from said at least one I-picture to the end of a second of said two P-pictures.
Claim 34
Dependent Claim
192 words
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) 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 positions of said at least one I-picture and said at least one P-picture relative to said at least one I-picture in said data stream; means for recording said at least one I-picture, said at least one P-picture and the positional information on said record medium; means for reproducing said data stream from said recording medium; 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.
Claim 35
Dependent Claim
36 words
The apparatus of claim 34, wherein said means for generating positional information is operable to generate positional information representing data length from said at least one I-picture to the end of said at least one P-picture.
Claim 36
Dependent Claim
64 words
The apparatus of claim 35, wherein said means for recording is operable to record said at least one I-picture and said at least one P-picture in a sector; and wherein said means for generating is operable to generate positional information further representing data length from beginning of said sector including said at least one I-picture to the end of said at least one P-picture.
Claim 37
Dependent Claim
20 words
The apparatus of claim 36, wherein said means for recording is operable to record said positional information in said sector.
Claim 38
Dependent Claim
37 words
The apparatus of claim 37, wherein said means for coding is operable to code the picture data using bidirectionally predictive coding the picture data to provide a plurality of bidirectionally predictive coded (B-pictures) in said data stream.
Claim 39
Dependent Claim
22 words
The apparatus of claim 37, wherein each of said at least one I-picture and said at least one P-picture constitutes a frame.
Claim 40
Dependent Claim
37 words
The apparatus of claim 34, wherein said means for detecting is operable to detect positional information representing data length from said at least one I-picture to the end of a first of said at least one P-picture.
Claim 41
Dependent Claim
59 words
The apparatus of claim 40, wherein said means for reproducing is operable to reproduce said data stream from a sector; and wherein said means for detecting said positional information is further operable to detect positional information representing data length from beginning of said sector including said at least one I-picture to the end of said at least one P-picture.
Claim 42
Dependent Claim
14 words
The apparatus of claim 41, wherein said positional information is recorded in said sector.
Claim 43
Dependent Claim
47 words
The apparatus of claim 34, wherein the data stream contains two P-pictures; and wherein said means for generating positional information is further operable to generate positional information representing the data length from said at least one I-picture to the end of a second of said two P-pictures.
References Cited (Backward Citations)
No citation records indexed.
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