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Determination method and device for judging whether or not failure point appears in demodulation process of receiver

A receiver, a specific technology, applied in the direction of TV, electrical components, image communication, etc., can solve problems such as inability to perform automated testing, and achieve the effect of improving testing efficiency and accuracy

Inactive Publication Date: 2018-06-12
国家广播电视总局广播电视规划院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the subjective judgment method requires testers to watch the screen for a long time to make judgments, and cannot perform automated testing

Method used

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  • Determination method and device for judging whether or not failure point appears in demodulation process of receiver
  • Determination method and device for judging whether or not failure point appears in demodulation process of receiver
  • Determination method and device for judging whether or not failure point appears in demodulation process of receiver

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Embodiment Construction

[0050] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0051] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0052] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods and devices should be considered part of the description.

[0053] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have differen...

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Abstract

The invention discloses a determination method and device for judging whether or not a failure point appears in the demodulation process of a receiver. The method comprises the steps that an audio code stream for testing is modulated into a radio frequency signal, wherein the audio code stream for testing has the fixed frequency or periodically-changed frequency; on the condition that the radio frequency signal is sent to the receiver at the signal power meeting normal demodulation of the receiver, a first audio signal obtained through demodulation of the receiver is acquired, and parameters of the first audio signal are obtained and taken as parameters of a standard audio signal; on the condition that the radio frequency signal is output to the receiver according to a specific rule, a second audio signal obtained through demodulation of the receiver is acquired, and parameters of the second audio signal are obtained; and the parameters of the second audio signal are compared with theparameters of the standard audio signal, and whether or not the failure point appears in the demodulation process of the receiver is determined according to a comparison result.

Description

technical field [0001] The present invention relates to the technical field of terrestrial digital television signals, and more specifically, relates to a determination method and device for determining whether a failure point occurs in a demodulation process of a receiver. Background technique [0002] In August 2006, my country promulgated the national standard GB20600-2006 (DigitalTelevision Terrestrial Multimedia Broadcasting, referred to as DTMB) for terrestrial digital TV transmission. In December 2011, DTMB was officially included in the ITU-R BT.1306 Recommendation, becoming the fourth international standard for terrestrial digital television in the world. The world's first generation of terrestrial digital TV standards include: my country's DTMB, DTMB-A, America's ATSC (Advanced Television Systems Committee), Europe's DVB-T (Digital Video Broadcasting-Terrestria) and Japan's ISDB-T (Integrated Services Digital Broadcasting ). [0003] For terrestrial digital TV rec...

Claims

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Application Information

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IPC IPC(8): H04N17/00
CPCH04N17/004H04N2017/006
Inventor 杨帆冯景锋周兴伟曹志高杨常江高洋王乙
Owner 国家广播电视总局广播电视规划院
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