Sharp Kabushiki Kaisha Corporation

Takayoshi Yamaguchi

Jiro Kiyama

Shuichi Watanabe

Yuri Iwano

Michiyuki Sugino

Satoru Sagawa

Masaru Yoshida

Kyoji Kasuga

Hideaki Kizuki

Eiichi Takakura

Tomoya Shimura

Toshiaki Tabuchi

Junichi Aoki

Ayumi Kida

Futoshi Shimizu

Akiyoshi Nagawo

Motohide Nishimura

Natsuko Ikeda

The objective of the present invention is to manage reference movies using an index file, without causing the user to be perplexed. The reference movies are generated because of, for instance, the upper limit of the file size. The index file manages sets of information regarding the files being managed. Examples of these sets of information are information for determining whether or not a file is presented to the user, information for determining whether or not a file is original, and information indicating whether or not nondestructive editing has been done. Based on such information, the erasure, displaying a list, and so on are carried out. Thus, it is possible to manage the reference movies using the index file, without causing the user to be perplexed.

Data recording method, data erasure method, data display method, storage device, storage medium, and program

The invention provides data for display on the display area for a child frame when the child frame is synthesized and displayed on the parent frame in picture-in-picture playback in order to give the displayed area of the child frame in conformity with the video content in the parent frame, as well as providing a video display apparatus etc. for displaying the child frame at an appropriate displayed position using the data for display. A video display apparatusincludes: decodersandfor decoding two sets of video data; a synthesizerfor synthesizing the decoded videos to output; an input unitfor commanding display/non-display of the child frame; a processing controllerfor controlling the operations of decodersandin accordance with the command; and a position designatorwhich receives the command and the data for display and time information and designates the displayed position of the child frame to the synthesizer. The position designatordetermines the displayed position of the child-frame video in accordance with displayable time information of the child-frame video and information on the displayed area or displayable area depending on time, included in the data for display.

Video synthesizing apparatus and program

The invention provides data for display on the display area for a child frame when the child frame is synthesized and displayed on the parent frame in picture-in-picture playback in order to give the displayed area of the child frame in conformity with the video content in the parent frame, as well as providing a video display apparatus etc. for displaying the child frame at an appropriate displayed position using the data for display. A video display apparatusincludes: decodersandfor decoding two sets of video data; a synthesizerfor synthesizing the decoded videos to output; an input unitfor commanding display/non-display of the child frame; a processing controllerfor controlling the operations of decodersandin accordance with the command; and a position designatorwhich receives the command and the data for display, and time information and designates the displayed position of the child frame to the synthesizer. The position designatordetermines the displayed position of the child-frame video in accordance with displayable time information of the child-frame video and information on the displayed area or displayable area depending on time, included in the data for display.

An original stream file and an after-recording data file are managed as different files. In the original stream file, data is made up of sets of partial data (CU) divided in accordance with a predetermined interval. Likewise, in the after-recording data file, data is made up of sets of partial data (CA) divided in accordance with a predetermined interval. These sets of data are recorded onto a disc such that the after-recorded data (CA) is recorded in a region adjacent to a relevant original stream (CU). This allows reproduction and real-time after-recording with the use of a general MPEG-2 PS/TS decoder. Moreover, this allows realization of data recording that causes less interruption of reproduction when non-destructive editing is carried out with respect to an after-recorded result.

Method for recording AV data and associated data, AV data recording apparatus, AV data reproducing apparatus and method, and recording medium

The objective of the present invention is to manage reference movies using an index file, without causing the user to be perplexed. the reference movies are generated because of, for instance, the upper limit of the file size. The index file manages sets of information regarding the files being managed. Examples of these sets of information are information for determining whether or not a file is presented to the user, information for determining whether or not a file is original, and information indicating whether or not nondestructive editing has been done. Based on such information, the erasure, displaying a list, and so on are carried out. Thus, it is possible to manage the reference movies using the index file, without causing the user to be perplexed.

Data management method using a table, and related storage device, storage medium and program

A system records an AV stream composed of a plurality of record units (RUs) containing independently reproducible video units (VUs) of at least video or audio and program information (Movie atom) managing the AV stream, onto a recording medium. The program information contains a piece of information (Edit list atom) that manages a point of junction between the record units or between AV streams. In decoding the AV stream, decoding is halted or decoders are switched at the point of junction, based on the management information on the points of junction, for example.

Data recording method, data editing method, data decoding method, and apparatus and recording medium therefor

To produce a user program externally referring to an original program and to record postrecording data to the user program, ref_counter that indicates how many times the postrecording data is referred to from a user program of the postrecording data is set (S). The ref_counter having been set is recorded onto an optical disc, along with the user program thus produced (S).

Data recording method, data recording apparatus, and data recording medium

Method for recording AV data, AV data recording apparatus, data recording medium, program and program recording medium

Data recording method, data editing method, and data decoding method, and apparatus and recording medium therefor

When audio dubbing is implemented, error correction is performed for each ECC block. Therefore, even when one byte of data in an ECC block is rewritten, the whole ECC block to which the byte belongs needs to be read and rewritten. When audio dubbing data is scattered in ECC blocks, almost all ECC blocks, or all the data needs be rewritten in order to record audio dubbing data. By constructing ECC blocks including audio dubbing data so as not to contain original data, it is no longer necessary to read and rewrite unnecessary original data when audio dubbing data is overwritten.

Recording method, recording medium and recorder

In an apparatus of digitally recording and reproducing video signals, when video signal data in one image frame is divided into a multiple-number of parts (N-parts) by dividing the image frame into N-divided rectangular regions and the N-parts of data are recorded on respective N tracks, each rectangular region is divided into blocks each having a multiple number of pixels and the thus generated blocks is subjected to a bit reduction coding operation. In recording the blocks, each of blocks are recorded onto a corresponding track in such a sequence that the blocks are scanned in a reciprocating manner along short-side directions of the rectangular region on the image frame. When the data is reproduced in a varied speed playback mode, the data are modified by every short-side row of blocks to thereby provide a high-quality playback picture at the varied speed.

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Chiba, Japan

Takayoshi Yamaguchi