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. 22, 1996
Filed:
Dec. 27, 1994
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A code sequence includes a header code consisting of a series n 0 bits terminated by a 1 bit. A shifter outputs the code sequence in bit strings. Each bit string is made up of plural bits. A priority encoder performs arithmetic operation to count the number of consecutive 0 bits from the most significant bit of each bit string. An accumulator adds the results found by the priority encoder. A comparator compares the sum found by the accumulator with a set value n. The comparator outputs a coincidence signal if these two values are found equal. The priority encoder outputs a 1-bit-inclusion indication signal if a bit string includes a 1 bit. Upon receipt of the coincidence signal and the 1-bit-inclusion indication signal, a first AND circuit outputs a header detection signal. As a result of such arrangement, the code sequence is processed in units of plural bits, whereupon high-speed header code detection is accomplished without requiring the shifter and the accumulator, both of which are components of a header detector, to operate at high speed.