Method and device for transmitiing high-definition video signal

Patent metadata

Field	Value
Publication number	US-2016112692-A1
Application number	US-201514985382-A
Country	US
Kind code	A1
Filing date	Dec 30, 2015
Priority date	May 16, 2012
Publication date	Apr 21, 2016
Grant date	—

Abstract

Provided in embodiments of the present invention are a method and device for transmitting a high-definition video signal, comprising: isolating from the high-definition video signal a brightness signal and a chrominance signal, and, by using an analog signal transmission mode, using non-overlapping frequency hands to transmit respectively the brightness signal and the chrominance signal. The solution of the present invention employs the analog signal transmission method, utilizes independent frequency bands to transmit respectively the brightness signal and the chrominance signal, and ensures that the brightness signal and the chrominance signal do not affect each other, thus ensuring video quality and timeliness of the high-definition video signal when transmitted over a long distance.

First claim

1 .- 16 . (canceled)

17 . A method of transmitting a video signal, the method comprising:
separating a first signal and a second signal from the video signal; selecting a first band for transmitting the first signal; selecting, based on the first band, a second band for transmitting the second signal; transmitting the first signal in the first band; and transmitting the second signal in the second band, wherein the first band and the second band are separate bands.

18 . The method of claim 17 , wherein a clock synchronization signal is coupled at a blanking location of the video signal as a clock source of the second signal for recovering sample.

19 . The method of claim 17 , the selecting the first band comprising determining the bandwidth of the first band based on a horizontal resolution of the video signal or a frame rate.

20 . The method of claim 17 , the selecting the second band comprising determining the bandwidth of the second band based on a color resolution of the video signal.

21 . The method of claim 17 , wherein the video signal is in at least one format of the format 720P, the format 1080P, the format 1280H, or the format 1920H.

22 . The method of claim 17 , wherein the transmitting the first signal in the first band or transmitting the second signal in the second band comprises:
using a transmission mode of an analog signal.

23 . The method of claim 22 , wherein the using a transmission mode of an analog signal comprises:
converting the first signal into a first quantized value; modulating and then loading the second signal onto an intermediate-frequency carrier to generate a second quantized value; superimposing the first quantized value the second quantized value to generate a superimposed signal; and converting the superimposed signal into the analog signal for transmission.

24 . The method of claim 17 , wherein the first signal comprises a luminance signal, and the second signal comprises a chrominance signal.

25 . The method of claim 17 , wherein the first band and the second band are no more than a preset threshold, and the preset threshold is no less than 20 MHz.

26 . The method of claim 17 , wherein the first band and the second band are non-overlapping.

27 . The method of claim 17 , wherein the selecting the second band for transmitting the second signal comprises:
determining the frequency of the second band based on a preset frequency gap between the first band and the second band.

28 . A device for transmitting a video signal, the device comprises:
a separation module configured to separate a first signal and a second signal from the video signal; and a transmission module configured to
transmit the first signal in a first band, and
transmit the second signal in a second band,
wherein the first band and the second band are separate bands, and the second band is selected based on the first band.

29 . The device of claim 28 , wherein the device further comprises:
a synchronization module configured to couple a clock synchronization signal at a blanking location of the video signal as a clock source of the second signal for recovering sample.

30 . The device of claim 28 , wherein the transmission module is further configured to
convert the first signal into a first quantized value, modulate and then load the second signal onto an intermediate-frequency carrier to generate a second quantized value, superimpose the first quantized value and the second quantized value to generate a superimposed signal, and convert the superimposed signal into an analog signal for transmission.

31 . The device of claim 30 , wherein the transmission module is further configured to output the analog signal obtained by conversion onto a coaxial cable for transmission, wherein both the first band and the second band are no more than a preset threshold.

32 . The device of claim 28 , wherein the transmission module is further configured to
determine the bandwidth of the first band based on a horizontal resolution of the video signal or a frame rate.

33 . The device of claim 28 , wherein the transmission module is further configured to
determine the bandwidth of the second band based on a color resolution of the video signal.

34 . The device of claim 28 , wherein the transmission module is further configured to
determine the frequency of the second band based on a preset frequency gap between the first band and the second band.

35 . The device of claim 28 , wherein the first band and the second band are non-overlapping.

36 . The device of claim 28 , wherein the video signal is in at least one format of the format 720P, the format 1080P, the format 1280H, or the format 1920H.

Assignees

• Zhejiang Dahua Technology Co

Inventors

• Lyu Bingyun
• Zhu Jiangming
• Yin Jun

Classifications

• H04N5/067

  Arrangements or circuits at the transmitter end · CPC title

• H04N11/24 Primary

  High-definition television systems · CPC title

• H04N11/14 Primary

  in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system · CPC title

• H04N5/40

  Modulation circuits · CPC title

• H04N9/78

  for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter · CPC title