TH41004A3 - Low cost VSB encoder and RF modulation circuit for supplying VSB base-band signals to the radio frequency input channels of digital television receivers. - Google Patents

Abstract

DC60 (23/03/42) Encoder - Modulation circuit for the connection of a digital base-band TV signal to a digital VSB TV tuner incorporating a filter, a equalization circuit. And the correction cycle A face-to-face mistake For correcting the damage of the signal below the specified replacement point Encoder circuits - modulation circuits It processes the base band signal for transmitting at low power levels. On radio frequency channels With the characteristic of the frequency through the band below the nominal value Common-core cables or links in low-noise communications. Will connect to radio frequency signals Directly to the radio frequency input channel of the said television set A mistake or Any damage of the signal in the transmitted signal. Which is lower than the preset turning point It will be modified by the filter circuit and the equalization circuit built into the model television receiver. Such digital VSB Encoder circuits - modulation circuits for the connection of digital base-band television signals. With the TV receiver Digital VSB integrated filter circuit, equalization circuit. And the correction cycle A face-to-face mistake For correcting signal damage For transmitting at low power levels on radio frequency signals. Along with the characteristics of the frequency through the band below the value Identify a common-core cable or a low-noise communication link that connects the radio frequency signals directly to the channel. Through the radio frequency signal of the television receiver Any failure or damage to the output signal that is below the preset start point will be corrected. Edited by a filter circuit and an equalization circuit built into it. Digital TV receiver, VSB.

Claims (1)

1. How the digital signal system works for digital TV receiver dispensing. With circuit to correct the damage in the signal Received below the specified turning point, which consists of generating a compressed base-band digital signal. The encoding of the compressed base band signal as shown in the figure. Pattern for digital signal transmission and modulation of compressed base-band digital signals that pass through The encoding is then performed on a radio frequency carrier wave. For direct supply to radio frequency channels Laptop receiver: