APARELHOS PARA UM SISTEMA DE PROCESSAMENTO DE SINAL DE TELEVISAO DE ALTA DEFINICAO E PARA UM SISTEMA DE RECEPCAO DE UM SINAL DE ALTA DEFINICAO

摘要

A high definition television receiver including digital signal processing circuits receives a high definition television signal containing narrowband high priority information from which a system clock is derived, and low priority wideband information. After a channel change, a clock signal developed from narrowband information associated with the previously tuned channel is used as the receiver clock until a clock signal with a desired phase characteristic is developed from the narrowband information of the newly tuned channel.