Sony Corporation

Other

Sony United Kingdom Limited

Tetsuya Iwamoto

Akira Sugiyama

Hiroshi Inamura

Junichi Ogikubo

Atsumu Soda

James Hedley Wilkinson

Katsumi Tahara

Yasuo Iwasaki

Yoshihiro Murakami

Hiroshi Nakano

Hiroyuki Fujita

Yuichi Kojima

Hitoshi Sakamoto

Mikio Kita

Yoshinori Suzuki

Soichiro Niho

Tatsuji Yamazaki

Nirokazu Ito

Data indicative of a transfer mode of a transmission packet may be inserted into a payload portion contained in a serial digital transfer interface (SDTI) transmission packet. Also, data indicative of a timing mode of the transmission packet may be inserted into this payload portion. As the transfer mode, there may be provided a synchronous transfer mode and an isochronous transfer mode in addition to an asynchronous transfer mode. A timing mode may prescribe a timing mode in which a transmission packet may be transferred in synchronism with a field of a transmission frame. There may be provided a normal mode using a first field, an advanced mode using a second field and a dual mode using both fields. Depending upon the manner in which the timing mode is set, a system delay between the transmission and the reception can be minimized.

Method and device for data transmission

This invention relates to a data transmission method or the like for use in transmitting video data, audio data or the like. There is transmitted a serial digital transfer interface transmission packet in which an interval of each line of a video frame comprises an end synchronizing code area into which an end synchronizing code is inserted, an ancillary data area into which ancillary data is inserted, a start synchronizing code area into which a start synchronizing code is inserted and a payload area. Into the payload area, there are inserted first data containing extension data having stream information and second data containing main data comprising video data and/or audio data at the picture unit of video data. The stream information is information which indicates whether or not the picture unit belongs to a pre-roll interval located ahead of an editing interval, whether or not the picture unit belongs to an editing interval and whether or not the picture unit belongs to a post-roll interval located behind an editing interval. A reception side becomes able to positively edit data on a VTR, for example, by effectively utilizing the stream information.

Data transmitting method and data transmitter

An AV data input/output controlling circuit is connected through a data bus to a synchronous-asynchronous conversion circuit and through a control bus to a recording and reproduction controlling circuit. The AV data input/output controlling circuit inputs and outputs audio and/or video data of a normal data rate. The AV data input/output controlling circuit also inputs and outputs audio and/or video data of a higher data rate than usual. In the data recording and reproducing apparatus, audio and/or video data is transferred through a data bus synchronized with a reference synchronization signal S etc., the audio and/or video data input from an external unit is recorded in a storage device, and the audio and/or video data recorded in the storage device is reproduced and supplied to the outside.

Video data recording/reproducing system, audio/video data recording/reproducing device, its system, and data reproducing device

An image data reproducing method which is possible to obtain a search picture with high quality, a reproducing speed control apparatus, and a recording/reproducing apparatus by finding search speed that it is possible to reproduce image data as much as possible by using the most effectively plural reproducing heads in reproducing a search picture and by setting to the speed.

Data reproducing method, reproducing speed control apparatus and reproducing apparatus

Audio and video data recording and reproducing apparatus and method

A video data recording and reproducing apparatus with which the quality of the video is not lowered even if the compressed video data is recorded in an overlapped manner without accurate matching of boundaries of the GOP's, wherein a recording position control unit controls a recording system so that the recording start position is made earlier by exactly an amount of one GOP where the recording start position of the top data is recorded from the position immediately before the recording start GOP of the bottom data, the recording end position is made later by exactly the amount of one GOP where the recording of the recording end position of the top data in ended at the position immediately before the recording end GOP of the bottom data, and the recording start position is made later by exactly the amount of one GOP where the recording of the recording end position of the top data is ended at the position two GOP's before the recording start GOP of the bottom data. Further, the recording position control unit controls the input data switching unit and records the video data reproduced in advance in the part at which the recording position is altered as it is.

Video data recording and reproducing apparatus and method of same

A video data recording apparatus which divides video data which has been compressed and encoded in units of groups of pictures (GOPs) comprised of the video data of a predetermined plurality of frames into a plurality of data blocks of a predetermined format, adding a GOP identifying code for identifying a GOP of compressed and encoded video data, recording on a predetermined number of slanted tracks on the tape the plurality of data blocks. Also, a video data reproduction apparatus which reproduces the video data recorded by the video data recording apparatus by simple tracking control.

Video data recording and reproducing apparatus and method thereof

Digital video tape recorder which includes a color framing sequence as part of a recorded control signal during standard recording, and which maintains synchronous color framing and/or continuous groups of pictures in two different editing modes in which a newly-suppled video signal is recorded on a magnetic tape already having stored thereon a previously recorded video signal. In a normal recording mode, a color framing signal indicating the occurrence of a newly supplied picture is detected in a supplied video signal. A video control signal that includes the detected color framing signal is generated and is recorded in a control track of the magnetic tape and the video signal is recorded in synchronization with the detected color framing signal in successive oblique tracks on the magnetic tape. In the first one of the editing modes, the traveling speed of the record medium is established so that the phase of the detected color framing signal and the phase of the generated reproduced color framing signal coincide thus maintaining synchronous color framing between the previously recorded and newly recorded video signals. In a second one of the editing modes, the group of pictures signal is inverted when the detected color framing signal and the reproduced color framing signal are out of phase by a pre-set amount this maintaining continuous groups of pictures between the previously recorded and newly recorded video signals.

Apparatus and method for recording and reproducing a video signal to and

A recording system adds a track identification (ID) data for identifying each of the slant tracks, in units of GOP, on a tape during the recording of compressed video and audio data. A tape transport is controlled as a function of a longitudinal control signal recorded on a longitudinal track of the tape if a playback control head can normally reproduce the control signal. If, however, the playback control head cannot reproduce the longitudinal control signal, the tape transport is controlled as a function of a slant control signal containing the track ID data previously recorded on the tape. Hence, the tape transport is accurately maintained even if a problem occurs with the playback control head.

Growing community of inventors

Kanagawa, Japan

Tetsuya Iwamoto