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DTV frequency channel switching method, DTV frequency channel switching system and DTV receiving terminal

A technology for channel switching and digital TV, which is applied to components of TV systems, components of color TVs, TVs, etc. It can solve the problem of slow channel switching, and achieve the effect of improving channel switching speed and saving switching time.

Active Publication Date: 2009-09-02
SHENZHEN SKYWORTH DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a digital TV channel switching method, aiming to solve the problem that the channel switching speed is relatively slow in the existing digital TV channel switching method

Method used

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  • DTV frequency channel switching method, DTV frequency channel switching system and DTV receiving terminal
  • DTV frequency channel switching method, DTV frequency channel switching system and DTV receiving terminal

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] In the present invention, at least two tasks in the task of locking the new frequency point in the channel switching, the task of obtaining the audio and video PID, and the task of obtaining the control word are processed in parallel, compared with the serial processing of the previous three tasks, saving The switching time is shortened, and the channel switching speed is improved.

[0032] figure 1 The flow chart of the channel switching method of the digital TV provided by the present invention is shown, and the details are as follows:

[0033] In step S101, a channel switching instructi...

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Abstract

The invention is applicable to the field of DTV and provides a DTV frequency channel switching method, a DTV frequency channel switching system and a DTV receiving terminal, wherein the frequency channel switching method includes the following steps: A. receiving the instruction of frequency channel switching; B. fixing the corresponding frequency point of a target frequency channel when the target frequency is not on the current frequency point; C. obtaining the audio frequency and video PID of the target frequency channel; D. obtaining control characters; and E. utilizing the control characters to arrange a descrambler so as to descramble the corresponding audio frequency and video data of the audio frequency and video PID and to display the descrambled audio frequency and video data. The instruction of frequency channel switching indicates the target frequency channel, and at least two of the B, the C and the D steps are processed in parallel. Compared with the previous method of processing three tasks serially, the invention optimizes the operating time of each link, saves the switching time on the whole and increases the speed of frequency channel switching by in parallel processing of at least two of the tasks of fixing a new frequency point in frequency channel switching, obtaining the audio frequency and video PID and obtaining the control characters.

Description

technical field [0001] The invention belongs to the field of digital television, and in particular relates to a digital television channel switching method, system and digital television receiving terminal. Background technique [0002] With the popularization of digital TV, many families have used digital TV receiving terminals to watch digital TV. Channel switching speed has always been an important indicator for testing digital TV receiving terminals, and it also directly affects users' favorability for digital TV receiving terminals. [0003] At present, the channel switching method adopted by the digital TV receiving terminal is: when receiving the channel switching instruction, first, according to the target channel indicated by the channel switching instruction, determine the frequency point where the target channel is located, and when the frequency point where the target channel is located is not When it is the current frequency point, tune to a new frequency point...

Claims

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Application Information

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IPC IPC(8): H04N5/50H04N5/44H04N7/24H04N7/167H04N21/438H04N21/4385
Inventor 叶新民
Owner SHENZHEN SKYWORTH DIGITAL TECH CO LTD
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