US 7,010,219 B2Granted

Coded picture data reproducing apparatus

AssigneeKabushiki Kaisha Toshiba

InventorMasaki Nakagawa

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Abstract

A coded picture data reproducing apparatus which is able to repetitively reproduce picture data starting at a designated start-frame is provided. The coded picture data reproducing apparatus is capable of reproducing predictively coded MPEG system picture data by using a correlation between frames and thus capable of repetitively reproducing frames across a designated start-position and an end-position. When a frame corresponding to a B-picture to be reproduced in preceding a frame corresponding to an I-picture, among picture data in GOPs in reproduction is designated as a start-frame, a controller Mp controls to execute the repetitive reproduction across the start-frame and an end-frame by controlling an optical pickup Pu, a memory Dmp for storing picture data and an MPEG decoder Mpg to fetch the B-picture of the frame corresponding to the decoded start-frame.

Claims11

Dependent claims

A coded picture data reproducing apparatus for reproducing a coded picture data which is coded from a picture signal comprised of several frames corresponding to pictures to be reproduced in the specific reproducing sequence based on the predictive coding system, and which is comprised of several groups of data which consists of an intraframe coded picture data, an interframe forward predictive coded picture data and bi-directional predictive coded picture data, comprising:

a data fetcher for fetching the coded picture data;
a decoder for decoding the picture data corresponding to each frame of the coded picture data;
a memory for storing an interframe forward predictive coded picture data corresponding to the frame which will be reproduced last within the picture data group among the decoded picture data decoded by the decoder;
a start-frame designator for designating a start-frame among the frames mentioned above;
an end-frame designator for designating an end-frame among the frames mentioned above;
a memory controller for controlling the memory to store the interframe forward predictive coded picture data corresponding to the frame which will be reproduced last of the picture data group that is reproduced just before the picture data group where the picture data corresponding to the start-frame belongs when the start-frame is designated by the start-frame designator;
a data fetcher controller for controlling the data fetcher to fetch the picture data of the picture data group where the picture data corresponding to the start-frame belongs when the end-frame is designated by the end-frame designator;
a memory controller for controlling the memory to yield the interframe forward predictive coded picture data;
and
a decoder controller for controlling the decoder to decode the bi-directional predictive coded picture data corresponding to the frame which is reproduced between the frame corresponding to the interframe forward predictive coded picture data output from the memory and the frame corresponding to the intraframe coded picture data in the picture data group where the start-frame belongs by using the interframe forward predictive coded picture data and the intraframe coded picture data, further controlling to decode the picture data corresponding to the frames up to the end-frame,
and wherein, the pictures corresponding to the respective frames from the start-frame to the end-frame are repetitively reproduced.

8 more elements

A coded picture data reproducing apparatus for reproducing a coded picture data which is coded from a picture signal comprised of several frames corresponding to pictures to be reproduced in the specific reproducing sequence based on the predictive coding system, and which is comprised of several groups of data which consists of an intraframe coded picture data, an interframe forward predictive coded picture data and bidirectional predictive coded picture data, comprising:

a data fetcher for fetching the coded picture data;
a decoder for decoding the picture data corresponding to each frame of the coded picture data;
a memory for storing the bi-directional predictive coded picture data corresponding to a frame which is reproduced in preceding a frame of the intraframe coded picture data in the group of picture among the picture data decoded in the decoder;
a start-frame designator for designating a start-frame among the aforesaid frames;
an end-frame designator for designating an end-frame among the aforesaid frames;
a memory controller for controlling the memory to store the bi-directional predictive coded picture data corresponding to a frame reproduced in preceding a frame of the intraframe coded picture data in a picture data group wherein a picture data of a start-frame belongs when the start-frame is designated by the start-frame designator;
a data fetcher controller for controlling the data fetcher to fetch the picture data of the picture data group where the picture data corresponding to the start-frame belongs when the end-frame is designated by the end-frame designator;
a memory controller for controlling the memory to yield the bi-directional predictive coded picture data;
and
a decoder controller for controlling the decoder to decode picture data following the bi-directional predictive coded picture output from the memory up to the end-frame,
and wherein, the pictures corresponding to the respective frames from the start-frame to the end-frame are repetitively reproduced.

8 more elements

a data fetcher for fetching the coded picture data;
a decoder for decoding the picture data corresponding to each frame of the coded picture data;
a data group address memory for storing the address data so as to search for the picture data group;
a start-frame designator for designating a start-frame among the aforesaid frames;
an end-frame designator for designating an end-frame among the aforesaid frames;
a memory controller for controlling the data group address memory to memorize address data for searching picture data of the picture data group which is reproduced just before the picture data group wherein the picture data of the start-frame belongs when the start-frame is designated by the start-frame designator;
a data fetcher controller for controlling the data fetcher to obtain picture data of a picture data group which is reproduced just before the picture data group wherein picture data of a start-frame belong based on the address data stored in the data group address memory when the end-frame is designated by the end-frame designator;
and
a decoder controller for controlling the decoder to decode the bi-directional predictive coded picture data corresponding to the frame which is reproduced between the frame corresponding to the interframe forward predictive coded picture data output from the memory and the frame corresponding to the intraframe coded picture data in the picture data group where the start-frame belongs by using the interframe forward predictive coded picture data and the intraframe coded picture data, further controlling the decoder to decode the picture data up to the end-frame,
and wherein, the pictures corresponding to the respective frames from the start-frame to the end-frame are repetitively reproduced.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/810,447Filed 19 Mar 2001
Priority: JP 2000-07517417 Mar 2000
Published: US 2001/0022892 A120 Sep 2001
Granted: 7 Mar 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G11B 27/007
Reproducing at a different information rate from the information rate of recording: reproducing continuously a part of the information, i.e. repeating
H04N 9/8042
Involving pulse code modulation of the colour picture signal components: involving data reduction
G11B 2220/2562
Optical discs: dVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
H04N 5/85
Using optical recording: on discs or drums