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Automatic identification method and device of composite video broadcast signal system

A composite video broadcasting and signal format technology, applied in the field of video encoding and decoding, can solve problems such as large algorithm complexity, and achieve the effect of simple automatic identification of control modules

Active Publication Date: 2015-01-28
思特威(上海)电子科技股份有限公司
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Problems solved by technology

[0015] This technical solution can flexibly identify the format of the signal, but the complexity of the algorithm is relatively large, and a special module is required to realize the function of automatically identifying the format, which brings complexity and complexity to the decoding device of the composite video broadcast signal. Additional hardware cost overhead

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  • Automatic identification method and device of composite video broadcast signal system
  • Automatic identification method and device of composite video broadcast signal system
  • Automatic identification method and device of composite video broadcast signal system

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0039] The first embodiment of the present invention relates to an automatic identification method of a composite video broadcasting signal system, the process is as follows figure 2 As shown, the specific steps are as follows:

[0040] Step 201, select an undetected system from all possible systems as the system of the cu...

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Abstract

The invention relates to the fields of video coding and decoding and discloses an automatic identification method and device of a composite video broadcast signal system. According to the automatic identification method and device of the composite video broadcast signal system, a system which is not detected is selected as the system of a CVBS (composite video broadcast signal) input currently from all possible systems; the CVBS input currently is decoded according to the parameter of the system selected currently so as to obtain a detection result used for judging the elements of the system; the condition whether the detection result of all the elements conforms to the system selected currently or not is judged; if the detection result of all the elements conforms to the system selected currently, the condition that the system selected currently is the actual system of the CVBS is judged; and if the detection result of all the elements does not conform to the system selected currently, various systems are tried one by one until a system conforming to the detection result of all the elements is found as the actual system of the CVBS. By adopting a method for trying various systems one by one for proving after supposing firstly according to the automatic identification method and device of the composite video broadcast signal system, the inherent hardware resource of a decoding circuit is fully utilized, the system of a composite video broadcast signal is quickly, effectively and automatically identified, and the cost of a decoder is greatly lowered.

Description

technical field [0001] The invention relates to the field of video encoding and decoding, in particular to an automatic identification method and device for composite video broadcasting signal standards. Background technique [0002] Composite video broadcast signal systems are mainly divided into three types: NTSC, PAL and SECAM, these three systems are not compatible with each other. NTSC (National Television System Committee abbreviation) standard, also known as quadrature balanced amplitude modulation system, because it was first developed and used by the United States, it is also called American system, Japan, Canada and other countries also use this system. The NTSC system is the world's first compatible color TV system successfully formally applied to television broadcasting. It selects a luminance signal and two color difference signals, and uses quadrature balance amplitude modulation to modulate the color difference signal to the color subcarrier. Spectrum interle...

Claims

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Application Information

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IPC IPC(8): H04N11/06H04N9/44H04N9/78
Inventor 金方其马伟剑邵科
Owner 思特威(上海)电子科技股份有限公司
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