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System and method for testing the compliance of a digital decoding device

A technology of decoding equipment and digital equipment, which is applied in the direction of TV, electrical components, image communication, etc., can solve the problems of undesigned conformity test, etc., and achieve the effect of simplifying the calculation method

Inactive Publication Date: 2005-01-12
THOMSON LICENSING SA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, these methods are not designed for compliance testing, where the testing can determine the effectiveness of the device

Method used

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  • System and method for testing the compliance of a digital decoding device
  • System and method for testing the compliance of a digital decoding device
  • System and method for testing the compliance of a digital decoding device

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Embodiment Construction

[0082] Test System 1 ( figure 1 with 2 ) is used to verify the compliance of decoder 3. The system includes: a calculation unit 12, designed to calculate the temporal change of the quality parameter according to the decoded video sequence; and a comparison unit 13, designed to compare the calculated quality parameter with the parameter stored in the memory Compare. The test system 1 also comprises a synchronization unit 11 capable of adding a synchronization sequence to the beginning of an encoded video sequence. This synchronization sequence enables an exact coincidence of the temporal changes of the respectively calculated and stored quality parameters in the memory.

[0083] During operation, a set of basic video test sequences VT 1 , VT 2 ,...VT n , these basic video test sequences were chosen for their ability to make the operational quality of the decoder appear in a discriminative manner. Coding unit 2 is able to test the sequence VT according to the basic video ...

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Abstract

The present invention relates to a system and a method for testing the compliance of a digital decoding device (3), and to a corresponding digital decoding unit.The system (1) comprises a separate unit (12) for calculating quality parameters (Mij) relating to results (VTDi) obtained from video test sequences (VTi) by means of the device to be tested and nonlinear as a function of these results. It also comprises a unit (13) for comparing, over time, these parameters and corresponding quality parameters (Pij), the latter being associated with reference results (VRDi) relating to video test sequences. The comparison unit produces binary results (Bij) corresponding respectively to the quality parameters by means of predetermined tolerance margins (Tij), thereby allocating to each of the binary results corresponding to one of the quality parameters a first value when the quality parameter associated with the device to be tested remains within the tolerance margin around the quality parameter associated with the reference results, over time, and otherwise, a second value. Application to an IRD.

Description

technical field [0001] The invention relates to compliance testing of digital equipment for decoding encoded video signals. Background technique [0002] Digital television broadcasts must conform to standards such as MPEG-2 (for "Moving Picture Experts Group") and DVB (for "Digital Video Broadcasting"). The video sequence is initially encoded and displayed on the screen in a system equipped with a so-called The DVB standard must be complied with during the various steps required between the reconstruction of this video sequence in the receiver of the decoder for the IRD ("Integrated Receiver Decoder"). The IRD includes especially television sets equipped with integrated decoders , and a separate receiving and decoding box (known as a "set-top box"). In particular, it is worthwhile to ensure that the digital decoding equipment used meets the requirements associated with the above-mentioned standards. [0003] In order to do this, the compliance of decoding devices must be t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
CPCH04N17/004H04N17/00
Inventor 斯特凡·阿利安德烈·马拉格斯洛朗·奥雷亚尔
Owner THOMSON LICENSING SA
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