The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1981
Filed:
Aug. 03, 1979
Hidetoh Hata, Yokohama, JP;
Katsumi Haji, Narashino, JP;
Kazushige Sako, Tokyo, JP;
Yoji Shibata, Yokohama, JP;
Masahiko Achiha, Iruma, JP;
Nippon Telegraph, Telephone Public Corp., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A digital video and audio file system is provided for use in systems such as a center-to-end video communication system. In the file system, video information, such as a color television video signal, is digitized in such a manner that it is separated into a luminance (Y) signal and a carrier chrominance (C) signal and these separated components are processed by the code differential method and the variable length encoding method. The digital signal thus digitized is recorded in a digital recorder. On the other hand, audio information is digitized by the AD-PCM encoding method and recorded in the same recorder. In encoding the video and the audio information, a part of hardware is used in common for both the signals, thus saving the hardware of the file system.