Matsushita Electric Industrial Co., Ltd.

Akio Uesugi

Ryuji Yasukohchi

Masaki Sato

Noriko G Tanaka

Hiroshi Uranaka

Takashi Hamada

Hisashi Takayama

Hiroshi Nishikawa

Masaki Satoh

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

In a paging receive for use in a radio paging system which employs a sophisticated data communication protocol, all protocol analysis operations such as de-interleaving and error correction processing are performed by a CPU which executes a control program, with the analysis being performed only on those received data frames which contain messages addressed to that paging receiver, and with the protocol analysis being performed first for the address field of such a frame, to obtain information specifying the position within a message field of that frame of requisite specific message data which are addressed to the paging receiver, then being performed only for these specific message data, within that message field. The control program is executed as two separate processes, each of which can be interrupted in response to interrupt signals supplied to the CPU and subsequently restarted, with one process performing protocol analysis and the other process performing operations which are requested through function switch actuations, so that such operations requests can be registered while protocol analysis is in progress, enabling rapid response to the requests.

Paging receiver which performs data communication protocol analysis

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

In a message receiving apparatus, a radio paging signal is demodulated into a baseband signal. The baseband signal is decoded into corresponding data. Address information is recovered from the data. Message information is recovered from the data. The recovered message information is subjected to an error correction process. On the other hand, the recovered address information is prevented from being subjected to the error correction process.

Message receiver

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.

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Tokyo, Japan

Akio Uesugi