Patent ID: 6211918
Filing Date: 2001-04-03
Classification: H04N

Abstract:
A television signal processing apparatus comprising:a NTSC signal processor for decoding an NTSC signal and producing a first decoded signal;a HDTV signal processor for decoding a HDTV signal and producing a second decoded signal;a first selector for selecting one of the first decoded signal and the second decoded signal to produce a selected signal;a matrix circuit for converting the selected signal to produce a matrix signal;a sync separating and clock pulse generating circuit for separating a synchronizing signal from the first decoded signal and the second decoded signal and producing a clock pulse used by said NTSC signal processor and said HDTV signal processor;a video signal converter for converting an analog input signal having a horizontal synchronizing signal and a vertical synchronizing signal comprising:(a) an input signal processor including:(1) a first clock pulse generator for producing a first clock pulse synchronized to the horizontal synchronizing signal of the analog input signal, and(2) means for converting said analog input signal to a digital signal using said first clock pulse;(b) a second clock pulse generator for producing a second clock pulse synchronized to the vertical synchronizing signal;(c) a memory for recording said digital signal synchronized with said first clock pulse;(d) a controller for outputting data that determines said first clock pulse and said second clock pulse to control write and readout positions of said memory; and(e) an output signal processor for outputting the digital signal from said memory using said second clock pulse based on the data from said controller, and converting said digital signal to an analog signal to produce a converter signal; anda second selector for selecting one of the matrix signal and the converter signal.