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:
Jun. 11, 1996
Filed:
Sep. 26, 1994
Nobuhiro Chiba, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A recording and/or reproducing apparatus for grouping input video data at an interval of a predetermined number of pixels and encoding each block by a DCT circuit, a quantization circuit and an entropy encoding circuit, recording the encoded data on a magnetic tape, and reproducing the magnetic tape for producing block-by-block data, which is decoded to produce output video data, includes a filtering circuit for reducing horizontal and vertical frequency components generated by repetitive occurrences of the respective data blocks. For a differential speed playback mode, such as shuttle playback, the video data reproduced and decoded during the differential speed playback mode is passed through the filtering circuit for producing a satisfactory playback image in which block components are suppressed even for the differential speed playback mode.