Matsushita Electric Industrial Co., Ltd.

Ryuji Yasukohchi

Akio Uesugi

Masaki Sato

Hayashi Ito

Hiroshi Nishikawa

Noriko G Tanaka

Hiroyuki Ito

Yoshiyasu Takeuchi

Masaki Kiyono

Masaki Satoh

Kozi Hatano

A multichannel recording and reproducing apparatus which includes: an input and output circuit; a buffer for temporally storing multichannel of video data through inputting and outputting circuit; a disc unit for storing the video data; a disc interface; a user interface circuit for receiving recording and reproducing commands and a corresponding file name from a user; a control circuit responsive to the user interface for obtaining one of N video channel circuits of the input and output circuit for inputting and outputting video data and receiving recording and reproducing commands; a filing circuit controlling files and determining first and second address data of the disc unit according to the recording and reproducing commands respectively; an access control circuit for accumulating the recording and reproducing commands and supplying each of the accumulated recording and reproducing commands when the disc interface is in a non-operating condition with priority provided to either of the recording or reproducing command according to priority data. The inputting and outputting circuit may includes a digital satellite broadcasted video data receiver and a separater for separating the multiplexed digital satellite broadcasted video data into a plurality of sets of digital video data.

Multichannel recording and reproducing apparatus

A recording and reproducing apparatus and method which prevents or managing a data loss caused by each of seek operations in recording/reproducing a time-series digital data set, to/from a disk recording media via a buffer. Beforerecording/reproducing, a check is made, by using a rate of data transfer with the outside, a data transfer rate in an access to a track where each of the selected sectors lies, and a seek time for each of changes in tracks, to see if the buffer will overflow/underflow during the period of recording/reproducing. If so, then an input/output data transfer rate is reduced before recording/reproducing to make the check. In case of recording, if there is at least a substitute for a sector which will cause the overflow, the sector is changed to a substitute.

Digital recording and reproducing apparatus and method which prevents or

A recording apparatus that can implement an endless recording function and a prealert recording function for video and audio data using a single random access recording medium having excellent random accessibility will be provided. The recording apparatus includes: an input section 101 that receives data; a recording section 103 that has a random access recording medium and makes a data recording onto the random access recording medium; and a control section 104 that sequentially records data onto recording sectors by controlling data transfer between the input section and the recording section. By causing the control section to repetitively overwrite data to a recording area, the endless recording function can be implemented.

Apparatus and method for recording digital data

A recording and reproducing apparatus and method which prevents or manages a data loss caused by each of seek operations in recording/reproducing a time-series digital data set, to/from a disk recording media via a buffer. Before recording/reproducing, a check is made, by using a rate of data transfer with the outside, of a data transfer rate in an access to a track where each of the selected sectors lies, and of a seek time for each of changes in tracks, to see if the buffer will overflow/underflow during the period of recording/reproducing. If so, then an input/output data transfer rate is reduced before recording/reproducing to make the check. In case of recording, if there is at least a substitute for a sector which will cause the overflow, the sector is changed to a substitute.

An image editing apparatus includes a variable-sized image memory memorizing variable-sized image plane data, a variable-sized image plane administrator administering the size of the image plane data, and a variable-sized image editor editing the variable-sized image plane data.

Growing community of inventors

Tokyo, Japan

Ryuji Yasukohchi