High-definition video signal transmission method and device

A high-definition video and signal transmission technology, applied in the field of communication, can solve the problem of video quality and real-time performance being difficult to guarantee, and achieve the effect of ensuring video quality and real-time performance.

Active Publication Date: 2012-10-10
ZHEJIANG DAHUA TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] Embodiments of the present invention provide a high-definition video signal transmission method and device, which are used to solve the problem i...

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  • High-definition video signal transmission method and device
  • High-definition video signal transmission method and device
  • High-definition video signal transmission method and device

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Embodiment 1

[0023] Embodiment 1 of the present invention provides a high-definition video signal transmission method, the steps of the method can be as follows figure 1 shown, including:

[0024] Step 101, signal separation.

[0025] In this embodiment, the luminance signal and the chrominance signal in the high-definition video signal need to be transmitted separately. Therefore, in this step, the high-definition video signal needs to be processed, and the luminance signal and the chrominance signal are separated from the high-definition video signal, so that subsequent operations can be performed on the separated luminance signal and chrominance signal.

[0026] Step 102, perform transmission.

[0027] In this embodiment, an analog signal transmission method is used to transmit high-definition video signals. Therefore, in this step, the luminance signal and the chrominance signal may be transmitted in an analog signal transmission manner. In order to ensure that the luminance signal...

Embodiment 2

[0035] Such as figure 2 Shown is the analog signal frequency domain diagram of 720P high-definition video signal, including: the analog signal is divided into signal bandwidth, in order to meet the requirements of long-distance transmission, according to the standard of coaxial cable signal attenuation, determine the upper limit of all signal bandwidth as fmax, Generally fmax adopts 20MHz. According to the frame rate and horizontal resolution requirements, the bandwidth of the luminance signal is determined to be fyMHz, generally 15MHz. According to the color resolution requirements of high-definition video signals, the bandwidth of the chrominance signal is determined to be fcd, generally 4MHz, and further according to the set frequency gap, the carrier frequency point of the chrominance signal is determined to be fcMHz, and the set frequency gap is generally 1MHz, that is, generally 18MHz is used as the carrier frequency point. In addition, the frequency bands occupied by...

Embodiment 3

[0039] Embodiment 3 of the present invention provides a high-definition video signal transmission device, the structure of which can be as follows Figure 4 shown, including:

[0040] The separation module 11 is used to separate the luminance signal and the chrominance signal from the high-definition video signal; the transmission module 12 is used to transmit the luminance signal and the chrominance signal by means of analog signal transmission, wherein the luminance signal and the chrominance signal The frequency bands occupied by chrominance signals during transmission do not overlap.

[0041] The transmission module 12 is specifically used to convert the luminance signal into a luminance quantized value, modulate the chrominance signal and load it onto an intermediate frequency carrier to form a quantized value after the chrominance signal modulates the carrier, and modulate the luminance quantized value and the chrominance signal The quantized values ​​after the carrier ...

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Abstract

The embodiment of the invention provides a high-definition video signal transmission method and device. The method comprises the following steps of: separating brightness signals and chrominance signals from high-definition video signals; and transmitting the brightness signals and the chrominance signals respectively by frequency bands which are not overlapped in an analog signal transmission mode. According to the scheme provided by the invention, the brightness signals and the chrominance signals are respectively transmitted by the independent frequency bands in the analog signal transmission mode, so that the brightness signals and the chrominance signals are not affected by one other, therefore, the video quality and real time performance of the high-definition video signals in the process of long-distance transmission can be ensured.

Description

technical field [0001] The present invention relates to the communication field, in particular to a high-definition video signal transmission method and device. Background technique [0002] In the security industry, when transmitting high-definition video signals, such as video streams collected by high-definition cameras, it is mainly used to encode the high-definition video signal and then transmit it over the network or use the original data of the high-definition video signal to use a digital serial interface (SDI, serial digital interface) The method of data transfer standard transfer. [0003] When transmitting high-definition video signals based on the method of network transmission after encoding, it is necessary to use network cables for transmission, resulting in loss of video quality and image delay. When long-distance transmission is required, the loss of video quality and image delay will be more serious, making it difficult to guarantee the video quality and ...

Claims

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Application Information

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IPC IPC(8): H04N11/24
CPCH04N11/002H04N11/24H04N5/067H04N5/40H04N9/44H04N9/78H04N11/14
Inventor 殷俊张兴明傅利泉朱江明吴军吴坚
Owner ZHEJIANG DAHUA TECH CO LTD
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