Digital television receiving terminal and method for switching channel thereof

Abstract

The invention discloses a digital television receiving terminal and a method for switching channels thereof. The digital television receiving terminal comprises a central processing unit (CPU), a tuner and a switching module, wherein the tuner and a switching module are connected with the CPU. The tuner comprises a multiple modem, the CPU comprises a multiple demultiplexer and a multiple audio and video decoder, a first path in the multiple modem is used for performing modulation and demodulation on a frequency point of a channel watched by a user, except the first path, the other paths in the multiple modem are respectively used for performing modulation and demodulation on frequency points of front and back channels adjacent to the channel watched by the user. The digital television receiving terminal can enable the user to fast switch to a wanted channel when the user is performing channel switching.

Description

technical field [0001] The invention relates to the technical field of digital television, in particular to a digital television receiving terminal capable of quickly switching channels and a channel switching method thereof. Background technique [0002] With the development of digital technology, multimedia technology and network technology, the application technology of digital TV receiving terminal (for example, set-top box) is becoming more and more mature, and its functions are becoming more and more powerful. From standard definition to high definition, from high definition to high definition interactive, from passively received analog TV programs to interactive digital TV, and to network digital set-top boxes, users can enjoy more and more abundant leisure life. However, with the diversification of TV broadcasting network content, the amount of information is getting larger and larger, and the amount of information received by the digital TV set-top box has also incr...

AI Technical Summary

Problems solved by technology

However, with the diversification of TV broadcasting network content, the amount of information is getting larger and larger, and the amount of information received by the digital TV set-top box has also increased greatly, such as Internet information, electronic program list information, subtitles, etc., so that As a result, users have an obvious waiting time when switching between different frequency points (that is, when performing channel switching operations). It takes a few seconds from frequency point locking, demultiplexing, descrambling, and audio and video decoding operations to program output. It usually takes about 2-3 seconds, especially when watching some high-definition programs, this process will be longer, which will bring an obvious sense of pause to the user, seriously affecting the user's operating experience

Therefore, although the digital TV set-top box has many benefits, there is a "stagnation period" of several seconds when the user uses the most channel-changing operation, which will obviously bring obvious discomfort to the user.

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