Quick channel search method of set top box

Abstract

The invention discloses a quick channel search method of a set top box, which comprises the following steps of: (1) starting a demultiplexing / multiplexing module by the set top box and locking a frequency point; and (2) searching a program aid table, a condition reception table and a service description table of the frequency point respectively by three demultiplexing / multiplexing passages in the demultiplexing / multiplexing module of the set top box simultaneously. Compared with the prior art, the demultiplexing / multiplexing module in the set top box searches the program aid table, the condition reception table and the service description table of one frequency point simultaneously; and in addition, a program mapping table is analyzed in parallel by utilizing the residual demultiplexing / multiplexing passages in the demultiplexing / multiplexing module, and program names corresponding to the program mapping table are quickly correlated simultaneously, thereby enhancing the working efficiency of the set top box and quickening the searching speed of programs.

Description

technical field [0001] The invention relates to a program search method of a set-top box, in particular to a method for quickly searching channels of a set-top box. Background technique [0002] In recent years, with the promotion of cable digital TV, cable digital TV set-top boxes have gradually entered thousands of households. The channel search method of the TV set-top box is quite different from that of the traditional analog TV. The channel search method of the traditional analog TV is to scan step by step from low frequency to high frequency according to the change of the frequency voltage curve, and According to the line and field synchronous state read out by the analog signal decoding module, the search process of the analog signal is completed, and when the program is stored, it only needs to save the relevant analog signal. [0003] For digital TV programs, in addition to frequency and related modulation parameters, various packet identification codes (PIDs) of d...

AI Technical Summary

Problems solved by technology

[0008] In the existing methods of improving the speed of digital TV station search, various technical solutions are mainly realized by increasing the scanning frequency and accelerating the tuning speed. The decoding and reading sequence of the transport stream data of a single frequency point needs to be PAT-PMT- SDT-CAT, and the analysis of the program mapping table in the program auxiliary table is also carried out one by one. The traditional method fails to give full play to the best performance of the system, and the search speed is not the optimal design.