Excavating
Patent
1985-07-19
1987-10-06
Fleming, Michael R.
Excavating
358340, G06F 1112
Patent
active
046988114
ABSTRACT:
An apparatus for recording or reproducing codes resulting from digitalizing a picture signal on or from a video tape recorder includes a device for correcting code error produced due to interference in the course of recording or reproducing process. The pixel codes succeeding to one another in time are divided to high-order and low-order bit-blocks, respectively, wherein the high-order bits are used to constitute a pseudo pixel code which is then added with a pixel error correcting code. The pixel code consisting of the high-order bits is added with a bit error correcting code before being recorded. In reproduction, error correction can be realized at higher rate with the aid of the correction codes to improve the quality of reproduced picture.
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patent: 4549298 (1985-10-01), Creed
patent: 4555784 (1985-11-01), Wood
patent: 4564945 (1986-01-01), Glover
patent: 4597083 (1986-06-01), Stenerson
Heitmann, J. K. R., "Digital Video Recording: New Results in Channel Coding and Error Protection", SMPTE Journal, Feb. 1984, pp. 140-144.
Hirano, Y., "A Study on Variable-Speed Reproduction of the Digital VTR", SMPTE Journal, Jun. 1983, pp. 639-641.
Eto Yoshizumi
Kanada Hidehiro
Mita Seiichi
Umemoto Masuo
Fleming Michael R.
Hitachi , Ltd.
Hitachi Denshi Kabushiki Kaisha
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