Victor Company of Japan, Limited

Masaki Mori

Hidetoshi Ozaki

Minoru Otani

Hironori Akasaka

In an encoding circuit for a digital video signal, a digital video signal is subjected to given orthogonal transform to be converted into corresponding conversion data. Components of the conversion data are scanned in a given order to generate a main data sequence from the conversion data. The main data sequence is separated into at least two sub data sequences. A first of the two sub data sequences is encoded into corresponding words of a given variable-length code. A second of the two sub data sequences is encoded into corresponding words of the variable-length code.

Processing system for digital video signal

A digital video signal coding circuit has a first DCT circuit for DCT converting a digital video signal with respect to frame and second DCT circuit for DCT converting the digital video signal with respect to fields which is used to reduce high frequency component of image. These outputs are selected according to high frequency components. The selected signal is separated to two signals respectively coded with data compression through VLC circuits which are provided to speed up the processing speed with non-industrial use ICs. A helical scan video tape recorder records the digital video signal such that at a lower portion (width direction) of slant track on a video tape, video data of an upper screen portion of the first field is recorded, at an upper portion of the track, video data of the upper screen portion of the second field is recorded, at a lower portion of the next slant track, video data of a lower screen portion of the first field is recorded, and at an upper portion, video data of the lower screen portion of the second field is recorded. This provides favorable image on a searching mode.

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Yokosuka, Japan

Masaki Mori