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:
Sep. 06, 1977
Filed:
Sep. 30, 1976
Applicant:
Inventors:
Hiroshi Yasuda, Tokorozawa, JA;
Fumio Kanaya, Tokyo, JA;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358136 ; 358 85 ;
Abstract
In interframe coding apparatus in which an input signal is encoded by an interframe coder and its output code is written in a buffer memory, and is read out therefrom at a constant bit rate, a variable characteristics comb filter is provided at a stage preceding the interframe coder. The period of the frequency characteristics of the comb filter is selected to be the frame period of the input signal. By a controller, the occupancy of the buffer memory is detected to control either one or both of the attenuation in the elimination band and high frequency cut-off characteristics of the comb filter detected value to prevent an overflow from the buffer memory.