Processing method for digital high-definition video signal
A high-definition video and processing method technology, applied in high-definition television systems, high-definition color televisions, etc., can solve the problems of high CPU requirements, complex calculations, and poor video visual effects, and achieve video visual effect improvement , reduce the amount of computation, reduce the effect of requirements
Inactive Publication Date: 2008-06-11
宁波中科集成电路设计中心有限公司
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There are mainly two existing methods for converting digital high-definition video signals into standard-definition video signals: one is the simple extraction and sampling method, which directly extracts pixels from digital high-definition video signals to form standard-definition video signals. The implementation process is simple, but The video visual effect produced by this method is relatively poor; the other is the full-pixel filtering method, which mainly filters all the pixels in the high-definition video signal to form a standard-definition video signal, and the video visual effect produced by this method is better. , but the calculation is complex, and if it is implemented by software, it will have higher requirements on the central processing unit of the computer. If it is implemented by hardware, it will increase the complexity of the design and the area of the processing chip, thereby increasing the cost.
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] As shown in Figure 2, a kind of processing method of digital high-definition video signal, the resolution of digital high-definition video signal is 1920 * 1080, obtains the frame rate of the digital high-definition video signal after decoding, denoted as R, it is characterized in that it includes The following steps:
[0021] (1) Extract the luminance value and chrominance value of any field data of the digital high-definition video signal after decoding, represent with luminance matrix A and chrominance matrix B respectively, and the luminance element is denoted as A(i 1 , j 1 ), the chroma element is denoted as B(m 1 , n 1 ), for the brightness element A(i 1 , j 1 ) and the chroma element B (m 1 , n 1 ) to perform vertical downsampling to obtain the vertically downsampled luminance element C(i 2 , j 1 ) and the chroma elemen...
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The invention discloses a digital HDTV video signal processing method. The resolution of a digital HDTV video signal is 1920 x 1080. The frame rate of the decoded digital HDTV video signal is obtained. The brightness value and chromatic value of any field data of the decoded digital HDTV video signal is firstly extracted, the brightness elements of the brightness value and the chromaticity elements of the chromatic value undergo vertical sampling treatment and then undergo horizontal sampling treatment, and lastly the obtained brightness elements and the chromaticity elements after horizontal sampling are provided with up and down black edges according to the frame rate to obtain the brightness elements and chromaticity elements of a standard definition video signal and the resolution of the standard definition video signal is defined as 720 x 576 or 720 x 480. The invention has the advantages of not only enabling a standard definition TV to receive the HDTV video signal better, but also improving the visual effects of video output compared with an extracting sampling method, and reducing computation and the area of a processing chip compared with a full-pixel filtering method.
Description
technical field [0001] The invention relates to a digital signal processing method, in particular to a digital high-definition video signal processing method. Background technique [0002] The standard-definition analog video broadcast generally has problems such as narrow bandwidth of the image signal and low image definition. With the development of digital multimedia and digital TV technology, high-definition digital video broadcasting will gradually replace the current standard-definition analog video broadcasting and become the main source of future TV programs. According to the high-definition standard format announced by the American Society of Motion Picture and Television Engineers, there are three scanning formats for HDTV, namely 1280×720p, 1920×1080i and 1920×1080p. Our country uses 1920×1080i / 50Hz. However, due to the high price of high-definition digital TV, a large part of users in our country, especially ordinary working-class families, have put forward requ...
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Login to View More IPC IPC(8): H04N7/015H04N11/24
Inventor 杨柁黄晁许恩杨卫斌李海红
Owner 宁波中科集成电路设计中心有限公司