High-resolution composite video broadcast signal conversion system and coding and decoding method thereof
A composite video broadcasting and signal conversion technology, which can be used in video signal spatial resolution conversion, by changing the direction of input video signal field conversion, high-definition standard conversion, etc. Recognize chroma signal, line shake, etc.
Inactive Publication Date: 2017-05-17
SCIENTRONIC
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Problems solved by technology
Since the carrier frequency of the chroma signal is within the bandwidth of the luminance signal, although the notch filter and band-pass filter have been adopted in the prior art to separate the luminance and chroma signals, it is still easy to separate the original luminance signal Mistaking it as a chroma signal, resulting in a processing error and causing cross-color phenomenon, or mistaking the original chroma signal as a luminance signal, causing a processing error and causing a cross-luminance phenomenon
[0004] In addition, in addition to the above-mentioned problems, the image signals used by cameras in the existing security field can only use the 720x480 standard to analyze the composite video format due to the limitations of the original NTSC specification.
If you want to use high-resolution (such as 1280x720, 1920x1080) video formats, you must replace the original equipment and wiring, and there is a problem of high cost
Therefore, there is still room for improvement in the prior art for high-resolution processing of composite video broadcast signals
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[0037] The implementation of the present invention is described below through specific specific examples, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this description, and can also be implemented through other different specific examples or apply.
[0038] see figure 1 , the high-resolution composite video broadcast signal conversion system 1 of the present invention includes an encoder 10 and a decoder 20 . The encoder 10 is connected to an image sensor 30 to receive a digital signal captured by the image sensor 30 . The decoder 20 is connected to the encoder 10 through a coaxial cable 50 and connected to a display unit 40 . In one embodiment, the image sensor 30 can be combined with the encoder 10 to form a security camera, and the display unit 40 can be a screen.
[0039] The encoder 10 includes a pre-processing module 11 and an encoding module 15 . In one embod...
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The invention relates to a high-resolution composite video broadcast signal conversion system and a coding and decoding method thereof. Luminance signals are filtered at a first specific frequency, and chroma signals are filtered at a second specific frequency, with the second specific frequency being greater than the first specific frequency. Accordingly, the system and the method do not mix the luminance signals and the chroma signals, can send high-resolution composite video broadcast signals, do not need replacement of original equipment or wirings and have a low cost.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a high-resolution composite video broadcasting signal conversion system and a codec method thereof. Background technique [0002] The Composite Video Broadcast Signal (CVBS) used by current TV is to superimpose the luminance signal and the chrominance signal on a carrier before transmitting, wherein the luminance is the density of light intensity Photometric value, and saturation is used to represent the color information of the image. [0003] In the specification specified by the National Television System Committee (NTSC), the carrier frequency of the chroma signal is 3.58 MHz, and the bandwidth of the luminance signal is 6 MHz. Because the carrier frequency of the chroma signal is within the bandwidth of the luminance signal, although the notch filter and band-pass filter have been adopted in the prior art to separate the luminance and chroma signals, it is still ea...
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Login to View More IPC IPC(8): H04N7/01H04N9/78
CPCH04N7/0117H04N7/0125H04N7/0127H04N9/78
Inventor 范正达曹志匠李向乔
Owner SCIENTRONIC