WO2013170763A1 - 一种高清视频信号传输方法与装置 - Google Patents

一种高清视频信号传输方法与装置 Download PDF

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Publication number
WO2013170763A1
WO2013170763A1 PCT/CN2013/075709 CN2013075709W WO2013170763A1 WO 2013170763 A1 WO2013170763 A1 WO 2013170763A1 CN 2013075709 W CN2013075709 W CN 2013075709W WO 2013170763 A1 WO2013170763 A1 WO 2013170763A1
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Prior art keywords
signal
transmission
definition video
luminance
chrominance
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PCT/CN2013/075709
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English (en)
French (fr)
Inventor
殷俊
张兴明
傅利泉
朱江明
吴军
吴坚
Original Assignee
浙江大华技术股份有限公司
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Application filed by 浙江大华技术股份有限公司 filed Critical 浙江大华技术股份有限公司
Priority to US14/391,621 priority Critical patent/US9232204B2/en
Priority to EP13790619.4A priority patent/EP2814249B1/en
Priority to KR1020147035372A priority patent/KR101653960B1/ko
Publication of WO2013170763A1 publication Critical patent/WO2013170763A1/zh
Priority to US14/985,382 priority patent/US9832443B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/24—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • H04N5/40—Modulation circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

Definitions

  • High-definition video signal transmission method and device The present application claims priority to Chinese patent application filed on May 16, 2012 by the Chinese Patent Office, application number 201210150743.8, and the invention name is "a high-definition video signal transmission method and device" The entire contents of which are incorporated herein by reference.
  • the present invention relates to the field of communications technologies, and in particular, to a high-definition video signal transmission method and apparatus. Background technique
  • the transmission distance is limited in order to ensure the data transmission shield.
  • the maximum transmission distance of HD video signals in 720p format or 1080p format is within 100 meters. Therefore, the method of transmitting data using the SDI data transmission standard based on the original data also cannot guarantee the video shield of the high-definition video signal transmitted over long distances.
  • the traditional analog video long-distance transmission mainly uses the composite video blanking and synchronization (CVBS, Composite Video Blanking and Sync) method, and can not achieve the transmission of high-definition video signals above 960H.
  • CVBS Composite Video Blanking and Sync
  • the embodiment of the invention provides a high-definition video signal transmission method and device, which is used to solve the problem that the video shield quantity and real-time performance are difficult to be guaranteed when the high-definition video signal is transmitted over a long distance in the prior art.
  • a high definition video signal transmission method comprising:
  • the luminance signal and the chrominance signal do not overlap in a frequency band occupied by the transmission.
  • a high definition video signal transmission device comprising:
  • a separation module configured to separate a luminance signal and a chrominance signal from the high-definition video signal
  • a transmission module configured to transmit the luminance signal and the chrominance signal by using an analog signal transmission manner, wherein the luminance signal and the chrominance signal do not overlap in a frequency band occupied by the transmission.
  • the luminance signal and the chrominance signal are separated from the high-definition video signal, and the luminance signal and the chrominance signal are respectively transmitted by using the analog signal transmission mode by using the frequency band in which no overlap occurs.
  • the analog signal transmission method is used to separately transmit the luminance signal and the chrominance signal by using independent frequency bands, so as to ensure that the luminance signal and the chrominance signal do not affect each other, thereby ensuring the video of the high-definition video signal during long-distance transmission. Shield volume and real-time.
  • FIG. 1 is a flow chart showing the steps of a high-definition video signal transmission method according to Embodiment 1 of the present invention
  • FIG. 2 is a frequency domain diagram of an analog signal of a 720P high-definition video signal according to Embodiment 2 of the present invention
  • FIG. 3 is a time-domain diagram of an analog signal of a 720P high-definition video signal according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of an HD video signal transmission apparatus according to Embodiment 3 of the present invention. detailed description
  • the embodiment of the invention provides a method for transmitting high-definition video signals based on analog signals, which realizes long-distance transmission of high-definition video signals, and the high-definition video signals have no compression, no signal loss, no delay during transmission, thereby meeting the security industry's HD The need for video signal transmission.
  • a first embodiment of the present invention provides a high-definition video signal transmission method.
  • the process of the method may be as shown in FIG. 1 and includes:
  • Step 101 the signal is separated.
  • the luminance signal and the chrominance signal in the high-definition video signal need to be separately transmitted. 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 the subsequent operation can be performed for the separated luminance signal and chrominance signal.
  • Step 102 Perform transmission.
  • the high-definition video signal is transmitted by the analog signal transmission method. Therefore, in this step, the luminance signal and the chrominance signal can be transmitted by using an analog signal transmission method.
  • the frequency bands occupied by the luminance signal and the chrominance signal are completely independent during transmission, and no overlap occurs.
  • the luminance signal can be converted into a luminance quantization value.
  • the luminance signal can be converted into a luminance quantization value by using a baseband coding method.
  • the chrominance signal is modulated and then loaded onto the intermediate frequency carrier to form a quantized value of the chrominance signal modulated carrier, and the luminance quantized value and the quantized value of the chrominance signal modulated carrier are superimposed, and the superimposed signal is converted into an analog signal for transmission.
  • the superimposed digital signal converter can be used to convert the superimposed signal into an analog signal.
  • the luminance signal and the chrominance signal can be transmitted using a coaxial cable. Therefore, the converted analog signal can be output to the coaxial cable transmission.
  • the signal at the lower frequency can meet the long-distance transmission requirement, so that the maximum frequency of the frequency band occupied by the luminance signal and the chrominance signal can be set during transmission.
  • the set threshold can be set to be not less than 20 MHz. Preferably, the threshold can be set from 20MHz to 40 MHzo.
  • the horizontal resolution is at least 900 lines and above, and the bandwidth of the band transmitting the luminance signal can be determined.
  • the bandwidth of the transmission luminance signal can be determined according to the frame rate and the horizontal resolution requirement; according to the color resolution requirement of the high-definition video signal, the bandwidth of the transmission chrominance signal and the carrier frequency can be determined.
  • the carrier frequency point may be determined according to a frequency gap between the set intermediate frequency carrier frequency band and the frequency band of the transmission luminance signal, so that the luminance signal and the chrominance signal may be more transmitted and sampled. Well separated by a filter.
  • the luminance signal when the luminance signal is transmitted, the luminance signal can be transmitted in the low frequency band of the frequency band of 0 to fy MHz, and when the chrominance signal is transmitted by the intermediate frequency carrier, the bandwidth of the frequency band can be used as fed MHz, and the carrier frequency is fc MHz.
  • the intermediate frequency carrier transmits the chrominance signal, and the frequency bands occupied by the luminance signal and the chrominance signal do not overlap when transmitted.
  • the bandwidth of the transmitted luminance signal can be determined according to the frame rate and the horizontal resolution requirement, for example, the horizontal resolution is 720P, the frame rate is 25 frames, and 0 can be utilized.
  • the ⁇ 15MHz band transmits the luminance signal. If the determined IF carrier band bandwidth is 4 MHz, the carrier frequency can be determined according to the set frequency gap.
  • the carrier frequency can be 18 MHz; if the luminance signal is transmitted in the frequency band of 0 to 14 MHz, the intermediate frequency carrier When the bandwidth of the band is 4 MHz, the set frequency gap is 2 MHz, and the carrier frequency can be 18 MHz.
  • the low frequency bandwidth, frequency gap, and carrier frequency described in the above text can be adjusted according to actual conditions.
  • the cancellation of the high-definition video signal is used as a recovery clock source for the chrominance signal.
  • the baseband transmits the luminance signal with the frequency band of 0 ⁇ fy MHz, and the bandwidth of the used band is fed MHz.
  • the scheme of the first embodiment of the present invention is described by using a specific example for transmitting the chrominance signal of the intermediate frequency carrier of the fc MHz.
  • Figure 2 shows the frequency domain diagram of the analog signal of the 720P HD video signal, including: dividing the analog signal into the signal bandwidth.
  • fmax the general fmax is 20MHz.
  • the bandwidth of the luminance signal is determined to be fyMHz, which is generally 15MHz.
  • the bandwidth of the chrominance signal is determined to be fed, generally 4 ⁇ , and further, according to the set frequency gap, the carrier frequency of the chrominance signal is determined to be fcMHz, and the set frequency gap is generally It is 1MHz, that is, 18MHz is generally used as the carrier frequency point. And the frequency bands occupied by the luminance signal and the chrominance signal do not overlap, and the signals are transmitted in respective exclusive frequency bands.
  • Figure 3 shows the time domain diagram of the analog signal of the 720P HD video signal.
  • reference numeral 1 denotes a sync header of each line of the image of each frame of the high definition video signal
  • reference numeral 2 denotes a clock synchronization signal of the chrominance signal
  • reference numeral 3 denotes a signal converted by the high speed digital-to-analog converter.
  • reference numeral 4 denotes an electrical signal (analog chrominance signal) of the chrominance after the carrier is modulated on the analog signal converted by the high speed digital-to-analog converter.
  • Th represents the time occupied by each line of each frame of the high-definition video signal, and the high-definition video signal of the 720P, that is, the high-definition video signal of the effective pixel is 1280 X 720.
  • Th can Up to 52us;
  • Ta represents the effective use time of the luminance signal and the chrominance signal in each line of the image of each frame in the high-definition video signal.
  • the Ta can reach 42us. That is, the luminance signal and the chrominance signal of each line are transmitted during this time. It can also be seen that, according to the solution provided by the first embodiment of the present invention, the real-time performance of the high-definition video signal transmission can be better ensured.
  • a third embodiment of the present invention provides a high-definition video signal transmission apparatus.
  • the structure of the apparatus can be as shown in FIG. 4, and includes:
  • the separation module 11 is configured to separate the luminance signal and the chrominance signal from the high-definition video signal.
  • the transmission module 12 is configured to transmit the luminance signal and the chrominance signal by using an analog signal transmission manner, wherein the luminance signal and the chrominance signal do not overlap in a frequency band occupied by the transmission.
  • the foregoing transmission module 12 is specifically configured to convert the luminance signal into a luminance quantization value, modulate the chrominance signal, and then load the chrominance signal onto the intermediate frequency carrier to form a quantized value of the chrominance signal modulated carrier, and the luminance quantization value is used. And chroma The quantized values after the signal modulation carrier are superimposed, and the superimposed signals are converted into analog signals for transmission.
  • the foregoing transmission module 12 is further specifically configured to output the converted analog signal to the coaxial cable, and the highest frequency of the frequency band occupied by the luminance signal and the chrominance signal is not greater than a set threshold. .
  • the foregoing transmission module 12 may further be specifically configured to determine a frequency bandwidth of the transmission luminance signal according to a horizontal resolution requirement of the high-definition video signal, determine a frequency bandwidth of the transmission chrominance signal, and a carrier frequency according to a color resolution requirement of the high-definition video signal. point.
  • the foregoing transmission module 12 may further be specifically configured to determine a bandwidth of a transmission luminance signal according to a frame rate and a horizontal resolution requirement.
  • the foregoing transmission module 12 may be further specifically configured to determine a carrier frequency point according to a frequency gap between a set frequency band of the intermediate frequency carrier and a frequency band of the transmission luminance signal.
  • the apparatus may further include: a synchronization module 13:
  • the synchronization module 13 is configured to couple a clock synchronization signal to the blanking position of the high-definition video signal, and use it as a recovery clock source for the chrominance signal.
  • the high-definition video signal involved in the first embodiment to the third embodiment of the present invention may be a high-definition real-time video source of megapixels or more, and may be, but not limited to, any one of the 720P or 1080P formats.
  • the analog signal transmission mode can be used to separately transmit the luminance signal and the chrominance signal in the high-definition video signal by using independent frequency bands, thereby transmitting high-definition real-time of megapixels and above.
  • the video source can be used to transmit high-definition video signals in 1280H or 1920H format.
  • the luminance signal can be transmitted by using the baseband, and the chrominance signal can be transmitted by using the intermediate frequency carrier.
  • the analog luminance signal can be transmitted in the bandwidth of the ⁇ -fyMHz baseband according to the resolution requirement, and the analog chrominance signal of the intermediate frequency carrier modulated by the modulation and loading into the fcMHz frequency band is transmitted within the bandwidth of fcdMHz.
  • the threshold can be set, and the luminance signal and the chrominance signal can be transmitted in the frequency band with the highest frequency not higher than the set threshold, thereby satisfying the attenuation characteristic of the long-distance transmission of the coaxial cable to the signal frequency. , while ensuring the realization of long-distance transmission, further ensuring the reliability and stability of transmission.
  • a long distance of a high-definition video signal such as at least 300 meters, or even more than 500 meters, can be realized, and the high-definition video signal can be transmitted without compression, no signal loss, and no delay.
  • the problem that the method based on the post-encoding network transmission is difficult to implement in the original coaxial cable transmission system is also solved.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the present application is applicable to computer programs implemented on one or more computer usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is included. The form of the product.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Multimedia (AREA)
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Abstract

本发明实施例提供一种高清视频信号传输方法与装置，包括：从高清视频信号中分离亮度信号和色度信号，并利用模拟信号传输方式，利用不发生交叠的频带分别传输亮度信号和色度信号。根据本发明方案，采用模拟信号传输方法，利用独立的频带分别传输亮度信号和色度信号，保证亮度信号和色度信号互相不产生影响，从而可以保证高清视频信号在长距离传输时的视频质量和实时性。

Description

一种高清视频信号传输方法与装置 本申请要求在 2012年 5月 16日提交中国专利局、 申请号为 201210150743.8、发明名称为 "一种高清视频信号传输方法与装置"的中国专利申请的优先权， 其全部内容通过引用结合 在本申请中。 技术领域 本发明涉及通信技术领域， 尤其涉及一种高清视频信号传输方法与装置。 背景技术
在安防行业中， 在传输高清视频信号， 如高清摄像机釆集的视频流时， 主要釆用对高 清视频信号编码后网络传输或是将高清视频信号原始数据利用数字串行接口 （ SDI, serial digital interface ) 的数据传输标准传输的方法。
基于编码后网络传输的方法传输高清视频信号时， 需要釆用网线进行传输， 存在视频 盾量的损失和图像延时。 在需要进行长距离传输时， 视频盾量的损失和图像延时问题会更 加严重， 使得经过长距离传输的高清视频信号视频盾量和实时性难以得到保证。
基于原始数据利用 SDI的数据传输标准传输的方法传输高清视频信号时， 由于高清视 频信号的数据量比较大， 为了保证数据传输盾量， 传输距离会受到限制。 例如， 为了保证 数据传输盾量， 釆用 720p格式或 1080p格式的高清视频信号最大传输距离在 100米以内。 因此， 基于原始数据利用 SDI的数据传输标准传输的方法同样无法保证长距离传输的高清 视频信号视频盾量。
而传统的模拟视频长距离传输主要釆用复合视频消隐和同步（ CVBS, Composite Video Blanking and Sync ) 方法， 也无法实现对 960H以上高清视频信号的传输。
综上所述， 现有的长距离传输方案无法满足高清视频信号传输的视频盾量和实时性要 求。 发明内容
本发明实施例提供一种高清视频信号传输方法与装置， 用于解决现有技术中高清视频 信号长距离传输时， 视频盾量和实时性难以得到保证的问题。
一种高清视频信号传输方法， 所述方法包括：
从高清视频信号中分离出亮度信号和色度信号； 利用模拟信号传输方式传输所述亮度信号和所述色度信号；
其中， 所述亮度信号和所述色度信号在传输时占用的频带不发生交叠。
一种高清视频信号传输装置， 所述装置包括：
分离模块， 用于从高清视频信号中分离出亮度信号和色度信号；
传输模块， 用于利用模拟信号传输方式传输所述亮度信号和所述色度信号， 其中， 所 述亮度信号和所述色度信号在传输时占用的频带不发生交叠。 根据本发明实施例提供的方案， 从高清视频信号中分离亮度信号和色度信号， 并利用 模拟信号传输方式， 利用不发生交叠的频带分别传输亮度信号和色度信号。 根据本发明方 案， 釆用模拟信号传输方法， 利用独立的频带分别传输亮度信号和色度信号， 保证亮度信 号和色度信号互相不产生影响， 从而可以保证高清视频信号在长距离传输时的视频盾量和 实时性。 附图说明 图 1为本发明实施例一提供的高清视频信号传输方法的步骤流程图；
图 2为本发明实施例二提供的 720P高清视频信号的模拟信号频域图；
图 3为本发明实施例二提供的 720P高清视频信号的模拟信号时域图；
图 4为本发明实施例三提供的高清视频信号传输装置的结构示意图。 具体实施方式
本发明实施例提供一种基于模拟信号传输高清视频信号的方法，实现高清视频信号的 长距离传输， 在传输时高清视频信号无压缩、 无信号损失、 无延时， 从而可以满足安防行 业对高清视频信号传输的需求。
下面将结合说明书附图和各实施例对本发明方案进行说明。
实施例一
本发明实施例一提供一种高清视频信号传输方法， 该方法的步骤流程可以如图 1 所 示， 包括：
步骤 101、 信号分离。
在本实施例中， 需要对高清视频信号中的亮度信号和色度信号分别进行传输。 因此， 在本步骤中， 需要对高清视频信号进行处理， 从高清视频信号中分离出亮度信号和色度信 号， 使得后续可以针对分离出的亮度信号和色度信号进行操作。
步骤 102、 进行传输。 在本实施例中， 釆用模拟信号传输方法传输高清视频信号。 因此， 在本步骤中， 可以 利用模拟信号传输方式传输亮度信号和色度信号。 而为了保证亮度信号和色度信号不相互 产生影响， 亮度信号和色度信号在传输时占用的频带完全独立， 不发生交叠现象。
在本步骤中， 可以将亮度信号转化为亮度量化值， 具体的， 可以釆用基带编码方式， 将亮度信号转化为亮度量化值。 将色度信号调制后加载到中频载波上形成色度信号调制载 波后的量化值， 将亮度量化值和色度信号调制载波后的量化值进行叠加， 将叠加后的信号 转换为模拟信号进行传输。 具体的， 可以釆用高速数模转换器将叠加后的信号转换为模拟 信号。
在本实施例中， 可以釆用同轴线缆传输亮度信号和色度信号。 因此， 可以将转换后得 到的模拟信号输出至同轴线缆传输。 而基于同轴线缆长距离传输对信号频率的衰减特性， 在较低频率的信号能够满足长距离传输需要， 因此在传输时， 可以设定亮度信号和色度信 号占用的频带的最高频率均不大于设定阈值， 从而实现高清视频信号的长距离传输， 并保 证传输的可靠性和稳定性。 其中设定阈值可以设定为不小于 20MHz。 较优的， 设定阈值可 以为 20MHz~40 MHzo
根据高清视频信号的水平分辨率要求， 如，根据高清视频的分辨率要求水平分辨率至 少为 900线及以上， 可以确定传输亮度信号的频带带宽。 进一步的， 可以根据帧率及水平 分辨率要求确定传输亮度信号的频带带宽； 根据高清视频信号的色彩分辨率要求， 可以确 定传输色度信号的频带带宽以及载波频点。 进一步的， 在确定载波频点时， 可以根据设定 的中频载波频带与传输亮度信号的频带之间的频率空隙， 确定载波频点， 使得传输和釆样 时， 亮度信号和色度信号可以更好地通过滤波器分离。
在本实施例中， 传输亮度信号时， 可以利用频带为 0~fy MHz低频段基带传输亮度信 号， 釆用中频载波传输色度信号时， 可以利用频带带宽为 fed MHz, 载波频点为 fc MHz 的中频载波传输色度信号， 且亮度信号和色度信号在传输时占用的频带不发生交叠。
具体的，在釆用同轴线缆传输时， 可以根据帧率及水平分辨率要求确定传输亮度信号 的频带带宽， 例如， #>据水平分辨率为 720P、 帧率为 25帧， 可以利用 0~ 15MHz的频带传 输亮度信号。 若确定出的中频载波频带带宽为 4MHz, 可以根据设定的频率空隙， 确定载 波频点。 例如， 利用 0~15 MHz的频带传输亮度信号， 中频载波频带带宽为 4MHz时， 若 设定的频率空隙为 1MHz, 载波频点可以为 18MHz; 若利用 0 ~ 14MHz的频带传输亮度信 号， 中频载波频带带宽为 4MHz时， 设定的频率空隙为 2MHz, 载波频点可以为 18MHz。 上述文所阐述的低频带宽、 频率空隙、 载波频点均可以根据实际情况作出调整。
同时， 在本实施例中， 为了保证色度信号釆样过程的同步要求， 在高清视频信号的消 隐位置， 耦合一个时钟同步信号， 用作色度信号的恢复釆样时钟源。
下面以釆用同轴线缆作为传输介盾 , 针对 720P的分辨率、 25帧的帧率要求， 利用频 带为 0~fy MHz低频段基带传输亮度信号、 利用频带带宽为 fed MHz, 载波频点为 fc MHz 的中频载波传输色度信号为例， 通过一个具体的实例对本发明实施例一的方案进行说明。
实施例二
如图 2所示为 720P高清视频信号的模拟信号频域图， 包括： 将模拟信号划分信号带 宽, 为满足长距离传输的要求， 根据同轴线缆信号衰减的标准， 确定所有的信号带宽上限 为 fmax, —般 fmax釆用 20MHz。 根据帧率及水平分辨率要求， 确定亮度信号的带宽为 fyMHz,一般釆用 15MHz。 根据高清视频信号的色彩分辨率要求， 确定色度信号的带宽为 fed ,一般釆用 4ΜΗζ , 并进一步根据设定的频率空隙，确定色度信号的载波频点为 fcMHz , 设定的频率空隙一般为 1MHz, 即一般釆用 18MHz作为载波频点。 并且亮度信号和色度信 号各自占的频带不发生交叠， 以各自独占的频带传输信号。
如图 3所示为 720P高清视频信号的模拟信号时域图。 其中， 附图标记 1表示高清视 频信号中每一帧图像的每一行信号的同步头， 附图标记 2表示色度信号的时钟同步信号， 附图标记 3表示经高速数模转换器转化后的模拟信号上亮度的电信号 （模拟亮度信号） ， 附图标记 4表示经高速数模转换器转化后的模拟信号上， 调制载波后色度的电信号 （模拟 色度信号）。其中 Th表示传输高清视频信号中每一帧图像的每一行占用的时间，针对 720P 的高清视频信号， 即有效像素为 1280 X 720的高清视频信号， 依据本发明实施例一提供的 方案， Th可以达到 52us; Ta表示高清视频信号中传输每一帧图像的每一行中亮度信号和 色度信号的有效使用时间， 针对 720P的高清视频信号， 依据本发明实施例一提供的方案， Ta可以达到 42us,即每行的亮度信号和色度信号在这个时间内传输完成。由此也可以看出， 依据本发明实施例一提供的方案， 高清视频信号传输的实时性可以得到较好的保证。
与本发明实施例一和实施例二基于同一发明构思， 提供以下的装置。
实施例三
本发明实施例三提供一种高清视频信号传输装置， 该装置的结构可以如图 4所示， 包 括：
分离模块 11 , 用于从高清视频信号中分离出亮度信号和色度信号。
传输模块 12, 用于利用模拟信号传输方式传输所述亮度信号和所述色度信号， 其中， 所述亮度信号和所述色度信号在传输时占用的频带不发生交叠。
具体地， 上述传输模块 12, 具体用于将所述亮度信号转化为亮度量化值， 将色度信 号调制后加载到中频载波上形成色度信号调制载波后的量化值， 将所述亮度量化值和色度 信号调制载波后的量化值进行叠加， 将叠加后的信号转换为模拟信号进行传输。
具体地， 上述传输模块 12, 进一步具体用于将转换后得到的模拟信号输出至同轴线 缆传输， 且所述亮度信号和所述色度信号占用的频带的最高频率均不大于设定阈值。
上述传输模块 12, 还可以进一步具体用于根据高清视频信号的水平分辨率要求， 确 定传输亮度信号的频带带宽， 根据高清视频信号的色彩分辨率要求， 确定传输色度信号的 频带带宽以及载波频点。
上述传输模块 12, 还可以更进一步具体用于根据帧率及水平分辨率要求确定传输亮 度信号的频带带宽。
上述传输模块 12, 还可以更进一步具体用于根据设定的中频载波频带与传输亮度信 号的频带之间的频率空隙， 确定载波频点。
所述装置还可以包括： 同步模块 13:
同步模块 13 , 用于在高清视频信号的消隐位置， 耦合一个时钟同步信号， 用作色度 信号的恢复釆样时钟源。
本发明实施例一〜实施例三中涉及的高清视频信号可以为百万像素及以上的高清实时 视频源， 可以但不限于为 720P或 1080P格式中任意一种。
根据本发明实施例一〜实施例三提供的方案， 可以利用模拟信号传输方式， 利用独立 的频带分别传输高清视频信号中的亮度信号和色度信号， 从而可以传输百万像素及以上的 高清实时视频源， 尤其可以用于传输 1280H或 1920H格式高清视频信号。 进一步的， 可以 利用基带传输亮度信号， 利用中频载波传输色度信号。 且具体的， 可以根据分辨率要求， 在 Ο-fyMHz基带带宽内传输模拟亮度信号， 在 fcdMHz的带宽内， 传输通过调制、 加载到 fcMHz为频点的中频载波的模拟色度信号。 而在利用同轴电缆进行传输时， 可以设置设定 阈值， 利用最高频率不高于设定阈值的频带传输亮度信号和色度信号， 从而满足同轴线缆 长距离传输对信号频率的衰减特性， 在保证长距离传输实现的同时， 进一步保证传输的可 靠性和稳定性。 根据本发明实施例提供的方案， 可以实现高清视频信号的长距离， 如至少 300米， 甚至 500米以上的传输， 并可以实现高清视频信号无压缩、 无信号损失和无延时 的传输。 而且， 基于本发明实施例提供的方案， 还同时解决了基于编码后网络传输的方法 存在的难以实现在原有同轴线缆传输系统里的升级的问题。
本领域内的技术人员应明白， 本申请的实施例可提供为方法、 系统、 或计算机程序产 品。 因此， 本申请可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且， 本申请可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 （包括但不限于磁盘存储器、 CD-ROM、 光学存储器等）上实施的计算机程 序产品的形式。
本申请是参照根据本申请实施例的方法、 设备（系统）、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器， 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中， 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品， 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理， 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概 念， 则可对这些实施例做出另外的变更和修改。 所以， 所附权利要求意欲解释为包括优选 实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和 范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内， 则本申请也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种高清视频信号传输方法， 其特征在于， 所述方法包括：
从高清视频信号中分离出亮度信号和色度信号；
利用模拟信号传输方式传输所述亮度信号和所述色度信号；
其中， 所述亮度信号和所述色度信号在传输时占用的频带不发生交叠。
2、 如权利要求 1所述的方法， 其特征在于， 利用模拟信号传输方式传输所述亮度信号 和所述色度信号， 具体包括：
将所述亮度信号转化为亮度量化值；
将色度信号调制后加载到中频载波上形成色度信号调制载波后的量化值；
将所述亮度量化值和色度信号调制载波后的量化值进行叠加， 将叠加后的信号转换为 模拟信号进行传输。
3、如权利要求 2所述的方法， 其特征在于， 将叠加后的信号转换为模拟信号进行传输， 具体包括： 将转换后得到的模拟信号输出至同轴线缆传输， 且所述亮度信号和所述色度信 号占用的频带的最高频率均不大于设定阈值。
4、 如权利要求 3所述的方法， 其特征在于， 所述设定阈值不小于 20MHz。
5、 如权利要求 2所述的方法， 其特征在于， 根据高清视频信号的水平分辨率要求， 确 定传输亮度信号的频带带宽； 根据高清视频信号的色彩分辨率要求， 确定传输色度信号的 频带带宽以及载波频点。
6、 如权利要求 5所述的方法， 其特征在于， 根据高清视频信号的水平分辨率要求， 确 定传输亮度信号的频带带宽， 具体包括： 根据帧率及水平分辨率要求确定传输亮度信号的 频带带宽。
7、 如权利要求 5所述的方法， 其特征在于， 根据高清视频信号的色彩分辨率要求， 确 定传输色度信号的频带带宽以及载波频点， 具体包括： 根据设定的中频载波频带与传输亮 度信号的频带之间的频率空隙， 确定载波频点。
8、 如权利要求 1~7任一所述的方法， 其特征在于， 在高清视频信号的消隐位置， 耦合 一个时钟同步信号， 用作色度信号的恢复釆样时钟源。
9、如权利要求 1~7任一所述的方法，其特征在于， 高清视频信号釆用 720P格式或 1080P 格式中的任意一种。
10、 一种高清视频信号传输装置， 其特征在于， 所述装置包括：
分离模块， 用于从高清视频信号中分离出亮度信号和色度信号；
传输模块， 用于利用模拟信号传输方式传输所述亮度信号和所述色度信号， 其中， 所 述亮度信号和所述色度信号在传输时占用的频带不发生交叠。
11、 如权利要求 10所述的装置， 其特征在于， 传输模块， 具体用于将所述亮度信号转 化为亮度量化值， 将色度信号调制后加载到中频载波上形成色度信号调制载波后的量化 值， 将所述亮度量化值和色度信号调制载波后的量化值进行叠加， 将叠加后的信号转换为 模拟信号进行传输。
12、 如权利要求 11所述的装置， 其特征在于， 传输模块， 具体用于将转换后得到的模 拟信号输出至同轴线缆传输， 且所述亮度信号和所述色度信号占用的频带的最高频率均不 大于设定阈值。
13、 如权利要求 11所述的装置， 其特征在于， 传输模块， 具体用于根据高清视频信号 的水平分辨率要求，确定传输亮度信号的频带带宽，根据高清视频信号的色彩分辨率要求， 确定传输色度信号的频带带宽以及载波频点。
14、 如权利要求 13所述的装置， 其特征在于， 传输模块， 具体用于根据帧率及水平分 辨率要求确定传输亮度信号的频带带宽。
15、 如权利要求 13所述的装置， 其特征在于， 传输模块， 具体用于根据设定的中频载 波频带与传输亮度信号的频带之间的频率空隙， 确定载波频点。
16、 如权利要求 10~15任一所述的装置， 其特征在于， 所述装置还包括：
同步模块， 用于在高清视频信号的消隐位置， 耦合一个时钟同步信号， 用作色度信号 的恢复釆样时钟源。
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