EP0667713A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for recording and reproducing compressed video data
Assignee: Panasonic Holdings Corp
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Filing: 1995-02-10
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Granted: —
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Expires: 2015-02-10
Abstract
Abstract A recording apparatus for recording compressed video data has compressed video data generator (2) for generating a compressed video data having a plurality of intra frames each of which has no cross-reference to any other frames, and bidirectional interpolated frames and predictive frames each of which has cross-reference to other frame. In the first cycle operation, address detector (30, 32) detects addresses of the intra frames and stores the detected addresses in a memory (34). A scan information generator (38) generates, with reference to the stored addresses in the memory, scan information for an independent frame including one or two addresses of advanced intra frames and one or two addresses of previous intra frames. The scan information is inserted to each frame and then recorded on a disk. During the reproduce of the disk, the scan information is detected to have a quick access to the intra frame located near by.
Inventors
- 👤 Tatsuya Nishimura
- 👤 Wataru Masuno
- 👤 Hideaki Ogawa
- 👤 Akira Yoneyama
- 👤 Tatsuya Murata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 13:26
CPC Classifications
G; G06; G06T; G06T9/00; G06T9/004; G11; G11B; G11B27/00; G11B27/02; G11B27/031; G11B27/034; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3036; G11B27/32; G11B27/327; G11B27/329; H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/806; G11B2220/00; G11B2220/20; G11B2220/60; G11B2220/65; G11B27/11; H04N5/00; H04N5/76; H04N5/78; H04N5/7805; H04N5/781; H04N5/782; H04N5/783; H04N5/84; H04N5/85; H04N9/8063; H04N9/82; H04N9/8205
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
144 words
A recording apparatus for recording compressed video data, comprising: compressed video data generation means (2) for generating a compressed video data having a plurality of frames including independent frames each of which has no cross-reference to any other frames, and dependent frames each of which has cross-reference to other frame; address detection means (30, 32) for detecting addresses of said independent frames; memory means (34) for storing the detected addresses of said independent frames; scan information generation means (38) for generating, with reference to said addresses in said memory means, scan information for an independent frame including a predetermined number of addresses of neighboring independent frames; inserting means (42) for inserting said scan information to said frames and for producing a scan information added compressed video data; and recording means (46) for recording said scan information added compressed video data on a recording medium.
Claim 2
Dependent Claim
144 words
A recording apparatus for recording compressed video data, comprising: compressed video data generation means (2) for generating a compressed video data having a plurality of frames including independent frames each of which has no cross-reference to any other frames, and dependent frames each of which has cross-reference to other frame; address detection means (30, 32) for detecting addresses of said independent frames; memory means (34) for storing the detected addresses of said independent frames; scan information generation means (38) for generating, with reference to said addresses in said memory means, scan information for an independent frame including a predetermined number of addresses of neighboring independent frames; inserting means (42) for inserting said scan information to said frames and for producing a scan information added compressed video data; and recording means (46) for recording said scan information added compressed video data on a recording medium.
Claim 3
Dependent Claim
51 words
A recording apparatus as claimed in Claim 1, further comprising switching means (36) for switching between a first cycle for filling said memory means (34) with the detected addresses of said independent frames, and a second cycle after said first cycle for inserting said scan information by said inserting means (42).
Claim 4
Dependent Claim
44 words
A recording apparatus as claimed in Claim 1, further comprising dummy data adding means (6, 4) for adding a dummy data to said frames, and wherein said inserting means (42) comprises a replacing means (42) for replacing said dummy data with said scan information.
Claim 5
Dependent Claim
28 words
A recording apparatus as claimed in Claim 1, wherein said scan information includes addresses of at least one advanced independent frame and at least one previous independent frame.
Claim 6
Dependent Claim
26 words
A recording apparatus as claimed in Claim 1, wherein said inserting means (42) inserts said scan information to a header area in each of said frame.
Claim 7
Dependent Claim
78 words
A recording apparatus as claimed in Claim 1, wherein said compressed video data generation means (2) generates an MPEG standard compressed video data having a plurality of frames, and wherein said independent frame is an intra frame and said dependent frame is either one of a bidirectional interpolated frame and a predictive frame, and wherein said intra frame is followed by a plurality of bidirectional interpolated frames and predictive frames, all taken together defining a group of pictures.
Claim 8
Dependent Claim
21 words
A recording apparatus as claimed in Claim 1, wherein said frames in said group of pictures carry the same scan information.
Claim 9
Dependent Claim
89 words
A reproducing apparatus for reproducing compressed video data from a recording medium recorded by the recording apparatus of claim 1, comprising: scan information detection means (60) for detecting said scan information from the frames; scan information storing means (58) for storing the detected scan information; address reading means (62) for reading an address included in said scan information; accessing and reproducing means (50) for accessing an independent frame in the recording medium according to said read address and for reproducing the compressed video data from the accessed independent frame.
Claim 10
Dependent Claim
37 words
A reproducing apparatus as claimed in Claim 8, further comprising selecting means (52) for selecting one reproducing mode from a plurality of modes of a normal reproducing mode, a fast forward mode and a fast reverse mode.
Claim 11
Dependent Claim
109 words
A recording method for recording compressed video data, comprising the steps of: (a) generating a compressed video data having a plurality of frames including independent frames each of which has no cross-reference to any other frames, and dependent frames each of which has cross-reference to other frame; (b) detecting addresses of said independent frames; (c) generating, with reference to the detected addresses, scan information for an independent frame including a predetermined number of addresses of neighboring independent frames; (d) inserting said scan information to said frames and producing a scan information added compressed video data; and (e) recording said scan information added compressed video data on a recording medium.
Claim 12
Dependent Claim
109 words
A recording method for recording compressed video data, comprising the steps of: (a) generating a compressed video data having a plurality of frames including independent frames each of which has no cross-reference to any other frames, and dependent frames each of which has cross-reference to other frame; (b) detecting addresses of said independent frames; (c) generating, with reference to the detected addresses, scan information for an independent frame including a predetermined number of addresses of neighboring independent frames; (d) inserting said scan information to said frames and producing a scan information added compressed video data; and (e) recording said scan information added compressed video data on a recording medium.
Claim 13
Dependent Claim
31 words
A recording method as claimed in Claim 10, further comprising the step of: (f) adding a dummy data to said frames; and (g) replacing said dummy data with said scan information.
Claim 14
Dependent Claim
68 words
A reproducing method for reproducing compressed video data from a recording medium recorded by the recording method of claim 10, comprising the steps of: (h) detecting said scan information from the frames; (i) reading an address included in the detected scan information; (j) accessing an independent frame in the recording medium according to said read address; and (k) reproducing the compressed video data from the accessed independent frame.
Claim 15
Dependent Claim
68 words
A recording medium recorded according to the method of Claim 10, comprising: an independent frame which has no cross-reference to any other frames; a plurality of dependent frames, followed by said independent frame, each dependent frame having cross-reference to other frame; and a scan information for an independent frame including a predetermined number of addresses of neighboring independent frames, said scan information inserted in each of said frames.
Claim 16
Dependent Claim
21 words
A recording medium as claimed in Claim 13, wherein said scan information is inserted at a header portion in each frame.
Claim 17
Dependent Claim
28 words
A recording medium as claimed in Claim 13, wherein said scan information includes addresses of at least one advanced independent frame and at least one previous independent frame.
References Cited (Backward Citations)
No citation records indexed.
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