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:
Dec. 28, 1993
Filed:
Mar. 24, 1992
Hirofumi Nakagaki, Neyagawa, JP;
Naoshi Usuki, Neyagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A television standards conversion includes circuitry for generating first and second clocks. Time-axis compression and field frequency conversion circuitry is provided for performing time-axis compression on a signal and converting a field frequency of the 625/50 television standards to a field frequency of the 525/60 television standards by writing a digitized component signal of 625/50 television standards into a first digital memory having only one output port with the first clock and reading the signal from said first digital memory with the second clock. Scanning line interpolation circuitry is provided for performing scanning line interpolation processing for converting odd/even field attribute and converting spatial positions of scanning lines on the signal compressed on the time axis and converted in field frequency. Time-axis expansion and scanning line number conversion circuitry is provided for expanding the signal on the time axis by writing the signal having interpolated scanning lines into a second digital memory with the second clock and reading the signal from the second digital memory with the first clock, and for converting the number of scanning lines to that of the 525/60 standard by scanning line decimation processing.