WO2012171452A1 - 视频图像的适配处理方法、设备及系统 - Google Patents

视频图像的适配处理方法、设备及系统 Download PDF

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Publication number
WO2012171452A1
WO2012171452A1 PCT/CN2012/076755 CN2012076755W WO2012171452A1 WO 2012171452 A1 WO2012171452 A1 WO 2012171452A1 CN 2012076755 W CN2012076755 W CN 2012076755W WO 2012171452 A1 WO2012171452 A1 WO 2012171452A1
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Prior art keywords
display device
site
video
video conference
image
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PCT/CN2012/076755
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English (en)
French (fr)
Inventor
赵嵩
刘源
王静
余水安
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华为终端有限公司
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Publication of WO2012171452A1 publication Critical patent/WO2012171452A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/14Systems for two-way working
    • H04N7/15Conference systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/67Circuits for processing colour signals for matrixing

Definitions

  • Video image adaptation processing method, device and system The present application claims to be submitted to the Chinese Patent Office on June 14, 2011, the application number is 201110159189.5, and the invention name is "video image adaptation processing method, device and system” Chinese patent Priority of the application, the entire contents of which are incorporated herein by reference.
  • the present invention relates to the field of image processing, and in particular, to a method, device and system for adapting video images.
  • Remote display devices in video conferencing systems typically include liquid crystal display, plasma display, OLED (Organic Light-Emitting Diode) display, projection-based flat screen and non-planar screen (arc screen or folding screen)
  • the coding capability of the remote display device and the specific coding protocol are relatively different.
  • the existing multimedia transmission control protocol such as the H.245 protocol in the H.323 protocol suite, SIP (Session Initiation Protocol)
  • SDP Session Initialization Protocol
  • the ability negotiation can understand the processing capability of the other party through the capability negotiation process, and then can determine the capability parameters when the two parties communicate.
  • the capability parameters include but are not limited to: the coding and decoding protocols used by the communication parties, and the supported transmission bandwidth.
  • the embodiment of the present invention provides a method, a device, and a system for adapting a video image.
  • the video image can be corrected by using characteristic parameters of the display device, which can save manpower and can achieve the above purpose.
  • a video image adaptation processing method is applied to a video conference system, where the video conference system includes a video conference server, and at least two video conference terminals, wherein the at least two video conference terminals are respectively located at least In the two sites, the method includes:
  • the video conference server receives a video code stream to be transmitted to a display device of the first conference site for display;
  • the video conference server acquires the characteristic parameter of the display device of the first site, and the characteristic parameter of the display device of the first site is the display capability information of the display device in the first site where the first video conference terminal is located. ;
  • the video conference server processes the video code stream according to the characteristic parameter of the display device of the first site, and sends the processed video code stream to the first site.
  • An adaptation processing device for a video image comprising: a receiving unit, configured to receive a video code stream to be transmitted to a display device of a first site for display; and an acquiring unit, configured to acquire The characteristic parameter of the display device of the first site, the characteristic parameter of the display device of the first site is the display capability information of the display device in the first site where the first video conference terminal is located;
  • An execution unit configured to process the video code stream according to a characteristic parameter of the display device of the first site, and send the processed video code stream to the first site.
  • a video conferencing system includes: at least two video conferencing terminals, and a video conferencing device, wherein the at least two video conferencing terminals are respectively located in at least two conference sites, and the system includes:
  • the video conference server Receiving, by the video conference server, the video code stream to be displayed on the display device of the first site, and acquiring the characteristic parameter of the display device of the first site, the display setting of the first site
  • the characteristic parameter of the device is the display capability information of the display device of the site where the first video conference terminal is located, and the video conference server processes the video code stream according to the characteristic parameter of the display device of the first site, and after processing The video stream is sent to the first venue.
  • the method, device, and system for adapting a video image according to an embodiment of the present invention by receiving a video code stream to be displayed on a display device to be transmitted to a first site, and acquiring a display device characteristic parameter of the first site, and then The video code stream is processed according to the characteristic parameter of the display device of the first site, and the processed video code stream is sent to the first site.
  • the adjustment of the display device is usually completed by the engineering personnel relying on the judgment of the human eye in each venue, which wastes a lot of manpower, and cannot guarantee that the display device of the video conference terminal presents better.
  • the solution provided in the embodiment of the present invention has a better picture effect on the video picture by using the display device characteristic parameter.
  • FIG. 1 is a schematic structural diagram of a first video conference system according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a second video conference system according to an embodiment of the present invention
  • FIG. 4 is a block diagram of an apparatus for adapting a video image according to Embodiment 1 of the present invention
  • FIG. 5 is a video image of a video image according to Embodiment 2 of the present invention
  • FIG. 6 is a flowchart of a tone correction used to adjust the overall color tone of an image by interpolating pixels of an image using the number of interpolation points of the tone correction curve in Embodiment 2 of the present invention
  • FIG. 1 is a schematic structural diagram of a first video conference system according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a second video conference system according to an embodiment of the present invention
  • FIG. 4 is
  • FIG. 7 is a block diagram of a video image adaptation processing apparatus according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic diagram of a video conference system according to Embodiment 3 of the present invention. detailed description
  • Image adaptation means that the image is adjusted correspondingly according to the characteristics of different display devices, so that the adjusted image is displayed with better effects on display devices of different sizes and aspect ratios.
  • the video conference system shown in FIG. 1 is composed of a media control server (executing an MCU as an example), and N (where N > 2) conference terminals, wherein the MCU implements control and forwarding of media streams (including: Mixing of conference audio data, and combination of video images, etc.);
  • the video conference system shown in FIG. 2 is composed of N+1 (N > 2) video conference terminals, wherein one terminal is used as a conference conference terminal (hereinafter referred to as a chairman terminal), and the chairman terminal has the function of a conference terminal. In addition, it also has some functions of media control.
  • the chairman terminal can apply from the conference terminals to the management station (not shown in Fig. 2) by way of token control, and the conference terminal that has obtained the token serves as the chairman terminal.
  • the embodiment provides a video image adaptation processing method, as shown in FIG. 3, which is applied to a video conference system, where the video conference system includes at least two video conference terminals, where at least two video conference terminals are respectively located at least In the two venues, the method includes:
  • the first site in the 301 is an unspecified site in the video conference.
  • the characteristic parameter of the device is the display capability information of the display device in the first site where the first video conference terminal is located;
  • the method for obtaining the characteristic parameters of the display device of the first site may be at least two types as follows: Method 1: obtaining geometric correction parameters and color correction parameters of the display device in the first site; from the geometric correction parameters and the color correction parameters Extracting display device characteristic parameters;
  • Manner 2 Receive display device feature parameters sent by the video conference terminal in the first site. It should be noted that the sequence of the foregoing steps 301 and 302 is not strictly fixed. In a specific implementation process, 302 may be executed first, and then 301; or 301, 302, or 301 and 302 simultaneously. Executing, in this regard, there is no limitation in the embodiments of the present invention.
  • the processing of the video code stream according to the characteristic parameter of the display device of the first site may be specifically: first decoding the video code stream that is to be transmitted to the display device of the first site for display, obtaining a video image, and then according to the first site
  • Each of the display device characteristic parameters performs frame-by-frame adjustment on the video image.
  • the video image may be adjusted frame by frame according to the parameter combination of the characteristic parameters of the display device of the first site.
  • Other methods may be used in a specific application, and the embodiment of the present invention is not limited thereto. It may be an MCU device (as shown in FIG. 1), or may be a video conference terminal (such as a chairman terminal in the video conference system shown in FIG. 2) integrated with a video image adaptation processing module, for which the implementation of the present invention is implemented. The example is not limited.
  • the method for adapting the video image receives the video code stream to be displayed by the display device to be transmitted to the first site, and obtains the display device characteristic parameter of the first site, and then displays according to the first site.
  • the characteristic parameter of the device processes the video code stream, and sends the processed video code stream to the first site.
  • the adjustment of the display device different from the prior art is usually completed by the engineers in each venue relying on the judgment of the human eye, which wastes a lot of manpower, and cannot guarantee that the display device of the video conference terminal presents better.
  • the present invention The solution provided in the embodiment can correct the video image by using the display device characteristic parameters of the respective video conference terminals, which can save manpower and can make the display devices of different video conference terminals exhibit better picture effects.
  • the embodiment further provides a device for performing adaptation processing of a video image
  • the device may be a video conference server, such as an MCU device, or may be integrated with a video image.
  • the video conferencing terminal of the processing module includes: a receiving unit 401, an obtaining unit 402, and an executing unit 403.
  • the receiving unit 401 is configured to receive a video code stream to be transmitted to the first site display device for display;
  • the obtaining unit 402 is configured to acquire the characteristic parameter of the display device of the first site, where the characteristic parameter of the display device of the first site is the display capability of the display device in the first site where the first video conference terminal is located Information
  • the acquiring module may acquire the geometric correction parameter and the color correction parameter of the display device in the first site, and then extract the module from the geometric correction parameter.
  • the display device characteristic parameter is extracted from the color correction parameter.
  • the display device characteristic parameter sent by the video conference terminal in the first site is also received by the receiving module.
  • the embodiment of the present invention is not limited thereto.
  • the executing unit 403 is configured to process the video code stream according to the characteristic parameter of the display device of the first site, and send the processed video code stream to the first site.
  • the decoding module in the execution unit 403 decodes the video code stream to obtain a video image, and then the adjustment module performs frame-by-frame adjustment on the video image according to each parameter in the display device characteristic parameter of the first site.
  • the video image may be adjusted frame by frame according to the parameter combination of the characteristic parameters of the display device of the first site, and other methods may be used in the specific application.
  • the embodiment of the present invention may be used. Not limited.
  • the device provided by the embodiment of the present invention receives the video code stream to be displayed by the display device to be transmitted to the display device of the first site, and obtains the display device characteristic parameter of the first site by using the acquiring unit, and then adopts the execution unit according to the first site.
  • Display device feature parameters to process the video stream, And sending the processed video code stream to the first conference site.
  • the adjustment of the display device in the prior art is usually adjusted by the engineering personnel in each meeting place by relying on the judgment of the human eye, which wastes a lot of manpower, and cannot guarantee the total picture effect of the display device of the video conference terminal.
  • the display device of each video conference terminal provided in the embodiment of the present invention can correct the video image by using the display device characteristic parameter, which can save manpower and can make the display device of different video conference terminals appear better. Good picture effect.
  • the embodiment of the present invention further provides a video conference system, where the system is composed of at least two video conference terminals and a video conference server, where the at least two video conference terminals are respectively located in at least two conference sites.
  • the system includes;
  • the video conference server receives the video code stream to be transmitted to the display device of the first site, and obtains the characteristic parameter of the display device of the first site, where the characteristic parameter of the display device of the first site is the first
  • the display capability information of the display device of the site where the video conference terminal is located the video conference server processes the video code stream according to the characteristic parameter of the display device of the first site, and sends the processed video code stream to The first venue.
  • the video conference server acquires the characteristic parameter of the display device of the first site
  • the geometric correction parameter and the color correction parameter of the display device in the first site may be acquired, and the display is extracted from the geometric correction parameter and the color correction parameter.
  • the video conference server receives the display device characteristic parameter sent by the video conference terminal in the first conference site.
  • the video conference server processes the video code stream according to the characteristic parameter of the display device of the first site, and sends the processed video code stream to the first site. Specifically, the video conference server decodes the received video stream. Obtaining a video image, and adjusting the video image frame by frame according to each parameter in a characteristic parameter of the display device in the first site.
  • the video conferencing system provided by the embodiment of the present invention has at least two video conference terminals. Therefore, it is required to acquire characteristic parameters of display devices of different sites, and process the video code streams to be displayed to the display device of the corresponding site for processing.
  • the first site unspecified site in the video conferencing system
  • the video conference system provided by the embodiment of the present invention receives the video code stream to be displayed by the display device to be transmitted to the first site, and obtains the display device characteristic parameter of the first site, and the video code according to the characteristic parameter of the display device. The flow is adjusted.
  • the adjustment of the display device in the prior art is usually performed by the engineers in each venue relying on the judgment of the human eye, which wastes a lot of manpower, and cannot guarantee that the display effect of the display device of the video conference terminal is achieved.
  • the display device of each site provided in the embodiment of the present invention can correct the video image by using the display device characteristic parameter, thereby saving manpower and enabling the display device of different video conference terminals to exhibit a better picture effect. .
  • An embodiment of the present invention provides a video image adaptation processing method, which is applied to a video conference system, where the video conference system includes a video conference server, and at least two video conference terminals, wherein the at least two video conferences The terminal is located in at least two conference sites.
  • the solution provided by the embodiment of the present invention is a method for describing the adjustment of the video conference system by taking the first conference site where the video conference terminal is located as an example.
  • the method includes:
  • the debugging personnel are required to perform preliminary debugging on the display device in each site, so that the display effect of the display device is debugged to be geometrically aligned as much as possible, and the color is as close as possible to enable subsequent The operation efficiency is improved.
  • Step 501 The video conference server receives a video code stream that is to be transmitted to a display device of the first site for display.
  • the video conference server may be an MCU or a video conference terminal (ie, the chairman terminal shown in FIG. 2) integrated with the video image adaptation processing module, and the video conference terminal sends the video stream to be adjusted to the video conference server.
  • a video conference terminal ie, the chairman terminal shown in FIG. 2 integrated with the video image adaptation processing module, and the video conference terminal sends the video stream to be adjusted to the video conference server.
  • Step 502 Obtain geometric correction parameters and color correction parameters of the display device in the first site
  • the video conference server sends the geometric correction template image to the video conference terminal for display, the geometric correction template image is saved on the video conference server, and the video conference terminal captures the How to correct the effect image of the template image on the display device in the conference site where the video conference terminal is located, and transmit the captured image to the video conference server, and the video conference server calculates the geometric correction parameter according to the returned image;
  • the video conference server determines whether the error of the calculated geometric correction parameter satisfies the accuracy requirement. If the accuracy requirement is met, the geometric correction template image is corrected by using the calculated geometric correction parameter, and then on the display device of the conference site where the video conference terminal is located. The display effect is better. If the accuracy requirement is not met, the calculated geometric correction parameter is used to correct the geometric correction template image, and the display effect on the display device of the conference site where the video conference terminal is located is not good, for example, in a video conference. The splicing area is displayed on the display device of the site where the terminal is located. In this case, the calculation process of the video conference server is performed multiple times, and the template image after the geometric correction processing is sent to the display device of the site where the video conference terminal is located.
  • the video conference terminal captures the effect image on the display screen, and returns it to the video conference server, performs the calculation again, and iterates sequentially until the calculated geometric correction parameter error meets the accuracy requirement, and the calculated geometry is used. After positive geometric correction parameters for correcting the template image, so that the video conference venue terminal is located is displayed on the display device better;
  • the video conference server sends the color correction template image to the video conference terminal for display, and the color correction template image is saved in the video conference server, and the video conference terminal captures the color correction template image on the display device in the conference site where the video conference terminal is located.
  • the effect image, and the captured image is transmitted back to the video conference server, and the video conference server calculates the color correction parameter according to the captured image;
  • the video conference server determines whether the error of the calculated color correction parameter satisfies the accuracy requirement. If the accuracy requirement is met, the color correction template image is corrected by using the calculated color correction parameter, and then the display device of the site where the video conference terminal is located is displayed. The display effect is better. If the accuracy requirement is not met, the color correction template image is corrected by using the calculated color correction parameter, and the display effect on the display device of the conference site where the video conference terminal is located is not good, for example, in a video conference. When the display device of the site where the terminal is located, there is an over-bright area.
  • the calculation process of the video conference server is required to perform multiple iterations, and the template image after the color correction process is continuously sent to
  • the video conference terminal is displayed on the display device of the conference site, and the video conference terminal captures the effect image on the display screen and returns it to the video conference server.
  • the video conference server can calculate again, and iteratively, until the calculated color correction parameters are If the error satisfies the accuracy requirement, the color correction template image is corrected by using the calculated color correction parameter, so that the display effect on the display device of the site where the video conference terminal is located is better.
  • Step 503 The video conference server refers to the display capability information of the display device in the first site from the geometric correction parameter and the color correction parameter;
  • the display device characteristic parameters include: whether to perform subsequent processing identification, image horizontal resolution, image vertical resolution, image bit depth, geometric correction mark, geometric correction parameter, image brightness adjustment operation mark, image brightness adjustment coefficient.
  • the "identification of whether to perform subsequent processing" indicates whether the video image needs to be adjusted frame by frame by using characteristic parameters of the display device
  • Image horizontal resolution represents the horizontal resolution of the image displayed by the display device of the first site
  • image vertical resolution represents the vertical resolution of the image displayed by the display device of the first site
  • Image bit depth indicates the number of bits used to store each pixel, and determines the number of colors each pixel of the color image may have. For example, each pixel is represented by 8 bits, that is, the image bit depth is 8, and the maximum number of colors. 2 8 , that is, 256 color numbers;
  • “Geometry correction mark” indicates whether the "geometry correction parameter” is included in the display device characteristic parameter; when the display screen is composed of multiple screens, overlapping may occur between adjacent images, which will result in higher brightness of the overlapping portion image.
  • the image brightness adjustment correction image is applied, the entire screen is presented with an image of uniform brightness, and the "image brightness adjustment operation mark” indicates whether the image needs to be subjected to image brightness adjustment processing;
  • the display device characteristic parameters further include: matrix color correction mark, matrix color correction Parameters, tone correction mark, number of tone correction curve interpolation points, 3D-LUT (Threee Dimensions-Look-Up-Table) color correction mark, grid point interval in 3D-LUT, mesh in 3D-LUT Point data.
  • Matrix color correction refers to the relationship between the two images before and after correction. It can be represented by a matrix of 3*3, so that the matrix color correction parameters are applied to the image before correction. Color correction, "matrix color correction mark" indicates whether the image needs to be matrix color corrected. If matrix color correction is required for the image, the image is corrected frame by frame using matrix color correction parameters;
  • Hue is the color ⁇ which is the overall relationship between color and color, refers to the overall tendency of the color of the image, "tone correction mark" indicates whether the image needs to be corrected by hue; when the hue correction mark indicates that the image needs to be corrected by hue Reading the corresponding number of tonal correction curve interpolation points to interpolate the pixels of the image to adjust the overall color tone of the image;
  • 3D-LUT color correction is a method of performing image processing on an image that cannot be processed by the matrix color correction parameter, and specifically, a color correction method for correcting an image by interpolation according to a three-dimensional display lookup table.
  • "3D-LUT color correction mark" indicates whether the image needs to be 3D-LUT color correction, if you need to perform 3D-LUT color correction on the image, read the grid point interval and 3D- in the 3D-LUT Two parameters of the grid point data in the LUT, and the two parameters are used to adjust the image.
  • Step 502 and step 503 are the process of obtaining the display device characteristic parameter of the site where the video conference terminal is located, and obtaining the display device characteristic parameter of the site where the video conference terminal is located.
  • the step of the video conference server is to be transmitted to the video conference server.
  • the sequence of the two processes of displaying the video stream and the video conference server to obtain the display device characteristic parameters of the first site is not strictly determined, and may first receive the display device to be transmitted to the first site for display.
  • the video stream is obtained, and the display device characteristic parameter of the first site is obtained, and the display device characteristic parameter of the first site is obtained, and then the display device to be transmitted to the first site is displayed to display the video code stream, or both are simultaneously executed.
  • Step 504 The video conference server receives a display device characteristic parameter sent by the video conference terminal in the first conference site.
  • the video conference server receives the display device characteristic parameters sent by the video conference terminals in the respective conference sites, and the video conference terminal calculates the characteristic parameters of the display devices in the respective conference sites according to the characteristics of the display devices of the respective conference sites, and then calculates the characteristic parameters of the display devices in the respective conference sites.
  • the display device characteristic parameter is sent to the server in the SEI (Supplemental Enhancement Information) message in the H.263 protocol, and the SEI message in the H.263 protocol can be used to transmit the user-defined
  • the display device characteristic parameter in the embodiment of the present invention may be an unused storage space in the data layer in the SEI message, for example, the location of the address in the data layer in the SEI message is 36 to 256. Any one of the locations, preferably, the location of the address in the data layer in the SEI message is 256 to store the display device characteristic parameters, as shown in the following table.
  • the Category in the above table indicates the level of importance of different information specified in the H.263 protocol.
  • the value of the Category is 5, indicating that the importance of the message corresponding to the value is slightly lower, and important. Messages with a slightly lower degree may or may not be transmitted. After being lost during transmission, they may not be retransmitted.
  • the code stream structure of the display device characteristic parameter in the SEI information in the embodiment of the present invention is as follows: Display_Device_param(payloadSize) ⁇ descriptor
  • the Unsigned ( 12 ) of the descriptor in the above table indicates that the bit number occupied by the display characteristic parameter is unsigned 12 bits, and Unsigned ( 8 ), Unsigned (1), and U nsigned (32) have the same meaning as Unsigned (12).
  • the black body part represents the display device characteristic parameter element actually present in the video code stream, and the non-black body part is an auxiliary variable in the decoding process.
  • Step 505 The video conference server processes the video code stream according to the characteristic parameter of the display device of the first site, and sends the processed video code stream to the first site. Specifically, The received video stream is decoded to obtain a video image, according to the display design The prepared characteristic parameters adjust the video image.
  • the display device characteristic parameter is analyzed in turn, and the identifier of the identifier that is specified for the subsequent processing is 0 or 1 in the display device characteristic parameter. If the identifier of the subsequent processing is 0, the image does not need to be followed. Processing, stop parsing the display device characteristic parameter, if the value of the identifier of the subsequent processing is 1, it means that the image needs to be processed subsequently. If the identifier of the subsequent processing is assigned 1, the image is horizontally resolved. The three parameters of the rate, the vertical resolution of the image, and the depth of the image, and the image brightness adjustment coefficient is determined according to the horizontal resolution of the image, the vertical resolution of the image, and the depth of the image;
  • the geometric correction mark is assigned a value of 0 or 1.
  • the geometric correction mark is read. If the geometric correction mark is assigned a value of 0, it means that no geometric correction is required. At this time, the process of image brightness adjustment is entered, if the geometric correction mark is If the value is 1, it means that the display device characteristic parameter contains geometric correction parameters, and the image is processed accordingly;
  • the data length of each pixel is 32 bits, wherein 16 bits of the 32-bit data is the horizontal direction correction data, and the lower 16 bits is the vertical direction correction data, and each 16-bit data is high. 13bit is the integer part, and the lower 3bit is the fractional part, so the precision is 1/8 pixel.
  • the original image be I
  • the horizontal coordinate X of the pixel of the original image The vertical coordinate is Y.
  • the horizontal correction value is dx
  • the vertical correction value is dy.
  • the image brightness adjustment operation mark is assigned 0 or 1, and the image brightness adjustment operation mark is read. If the image brightness adjustment operation mark is set to 0, it means that the image does not need to be subjected to image brightness adjustment processing, and at this time, the matrix color is entered. The process of calibration, if the image brightness adjustment operation flag is set to 1, the read image brightness adjustment coefficient performs brightness adjustment processing on the image according to the determined image brightness adjustment coefficient;
  • the original image is set to I, and the horizontal coordinate X of the pixel of the original image is set.
  • the matrix color correction mark is assigned a value of 0 or 1, and the matrix color correction mark is read. If the matrix color correction mark is assigned a value of 0, it means that the image does not need to be subjected to matrix color correction processing, and at this time, the tone correction process is entered. If the matrix color correction flag is assigned a value of 1, the read matrix color correction coefficient performs color adjustment processing on the image according to the determined matrix color correction coefficient;
  • the matrix color correction coefficient is adjusted according to the matrix color correction coefficient, and the operation process is:
  • G 1 h 21 *R 0 +h 22 *Go+h 23 *B 0 , 2
  • [R. , Go, ⁇ . ] ⁇ is the pixel value of a point before correction
  • [ , d, is the pixel value of a certain point after correction
  • h n is the pixel value of a point before correction
  • h 12 , h 13 is the pixel value of a certain point after correction
  • h n is the pixel value of a certain point after correction
  • h 12 , h 13 is the pixel value of a certain point after correction
  • h 21 , h 22 , h 23 is the h 31 , h 32 , h 33
  • the elements in the field for adjusting the image color are set by the manufacturer according to the image sensor.
  • each color correction data length is 32 bits, the highest 24 bits are integer parts, and the lower 8 bits are fractional parts, so that the precision of the floating point number is 1/256.
  • the correction device of the video conference terminal acquires the pixel value of the A point before the correction, and obtains the pixel value of the corrected point A according to the above three calculation formulas of 1, 2, 3, and the obtained corrected image
  • the pixel value of point A is adjusted for the video image. Similarly, after all the pixel values of the image in each frame of the video image are adjusted in this way, the adjusted video image can be obtained;
  • the tone correction mark is assigned 0 or 1, and the tone correction mark is read. If the tone correction mark is set to 0, it means that the image does not need to be subjected to tone correction processing. At this time, the process of entering the 3D-LUT color correction is performed. The value of the tone correction mark is set to 1, and the number of interpolation points of the read tone correction curve is read. The pixel of the image is interpolated according to the determined number of interpolation points of the tone correction curve to adjust the overall color tone of the image;
  • the red component of the pixel is R 1 and the corrected red component is R.
  • the calibration process is:
  • the method for generating the curve is shown in Fig. 6, where F is the tone correction curve, and the results corresponding to il, i2 are ol, o2, respectively, and the portion of the tone correction curve F between il and i2 is (il, ol), (i2, o2) is obtained by linear interpolation; the pre-correction color in the correction data corresponds to i, and the corrected color corresponds to 0;
  • the 3D-LUT color correction mark is assigned 0 or 1 and the 3D-LUT color correction mark is read. If the 3D-LUT color correction mark is set to 0, it means that the image does not need to be subjected to 3D-LUT color correction processing, and exits.
  • the parsing process if the 3D-LUT color correction flag is assigned a value of 1, the grid point interval in the 3D-LUT and the grid point data color_lut_pivot in the 3D-LUT are read, and the two parameters are used to adjust the image. ;
  • the original image be I
  • the vertical coordinate is y.
  • the analysis flow is exited.
  • the video image adjusted by the display device characteristic parameter can be used to display a smooth picture on the display device. Adjusting, after the display device characteristic parameters are corrected for the video image, a smooth picture can be displayed on the display device.
  • the display device in the conference site where the video conference terminal is located may be a different display device, and may be different in number of display devices, may be different types of display devices, or may be a specific type of screen.
  • the display device may be a liquid crystal screen.
  • the three LCD screens are spliced into a flat surface;
  • the display device can be a conventional CRT (Cathode Ray Tube, a display using a cathode ray tube), which can be a liquid crystal;
  • the display device can be a flat screen, a folding screen, an arc curtain, etc., a video conference
  • the terminal receives the encoded frame-by-frame-adjusted video code stream, and displays it on the display device of the site where the video conference terminal is located, and can display a smooth picture.
  • the method for adapting the video image receives the video code stream to be displayed by the display device to be transmitted to the first site, and obtains the display device characteristic parameter of the first site, and displays the video according to the characteristic parameter of the display device.
  • the code stream is adjusted, and the adjusted video image is displayed on the display device on the video conference terminal.
  • the display device is usually used by the human eye to adjust the display device, which wastes a lot of manpower, and also fails to ensure that the display effect of the display device of the video conference terminal is always better.
  • the manpower can be saved, and the display device of different video conference terminals can be presented with a better picture effect.
  • an embodiment of the present invention provides a video image adaptation processing device, where the device is a video conference server, which may be an MCU, or may be integrated with a video image adaptation processing module.
  • Video conferencing terminal As shown in FIG. 7, the device includes: a receiving unit 701, an obtaining unit 702, an obtaining module 703, an extracting module 704, a receiving module 705, an executing unit 706, a decoding module 707, and an adjusting module 708.
  • the receiving unit 701 is configured to receive a display device to be transmitted to the first site to display a video stream;
  • the obtaining unit 702 is configured to acquire the characteristic parameter of the display device of the first site, where the characteristic parameter of the display device of the first site is the display capability of the display device in the first site where the first video conference terminal is located Information
  • the characteristic parameter of the display device is a characteristic parameter calculated according to the specific characteristics of the display device in the first site.
  • the characteristic parameters of the display device include: whether to perform subsequent processing identification, image horizontal resolution, image vertical resolution, image bit Deep, geometric correction marks, geometric correction parameters, image attenuation operation marks, image attenuation coefficients, and also include: matrix color correction marks, matrix color correction parameters, tone correction marks, number of tone correction curve interpolation points, 3D-LUT color correction marks, Grid point spacing in 3D-LUT, grid point data in 3D-LUT.
  • the obtaining unit 702 includes: an obtaining module 703, configured to acquire a geometric correction parameter and a color correction parameter of the display device in the first site; and an extraction module 704, configured to extract the display device from the geometric correction parameter and the color correction parameter Characteristic parameter Or the receiving module 705 of the acquiring unit 702 is configured to receive the display device characteristic parameter sent by the video conference terminal in the first conference site; at this time, the video conference terminal sets the characteristic parameter of the display device in the conference site where the video conference terminal is located. After calculation, send it to the video conference server.
  • the receiving module 705 is specifically configured to: receive a supplementary enhanced message SEI message in the H.263 protocol sent by the video conference terminal in the first site, where the SEI message carries the display device characteristic parameter.
  • the executing unit 706 is configured to process the video code stream according to the characteristic parameter of the display device of the first site, and send the processed video code stream to the first site.
  • the decoding module 707 in the execution unit 706 is configured to decode the received video code stream sent by the video conference terminal to obtain a video image.
  • the adjusting module 708 of the executing unit 706 is configured to perform frame-by-frame adjustment on the video image according to each of the display device characteristic parameters of the first site.
  • the device provided by the embodiment of the present invention is described by taking an example of processing the video code stream received in the conference according to the characteristic parameter of the display device of the first site, and specifically, receiving the characteristic parameter of the display device of each site, and processing the conference.
  • the received video stream is sent to the conference site.
  • the device provided by the embodiment of the present invention receives the video code stream to be displayed by the display device to be transmitted to the display device of the first site, and then the acquiring unit acquires the characteristic parameter of the display device of the first site, according to the display device characteristic of the first site.
  • the parameter adjusts the video stream and sends it to the first site.
  • the adjustment of the display device is usually performed by the judgment of the human eye, which wastes a lot of manpower, and at the same time, it cannot guarantee that the display effect of the display device of the video conference terminal is always better.
  • the display device provided in the embodiment of the present invention corrects the video image by using the display device characteristic parameters of the respective sites, so that the corrected video image can be adapted to the display device of different video conference terminals, so that the display device appears complete. Smooth picture and save manpower.
  • Example 3 The video processing system can be applied to the field of image processing to form a video conference system, so as to implement the above method.
  • the video conference system includes: a video conference terminal 801, and a video conference.
  • Terminal 802 (at least 2 video conferencing terminals) and one video conferencing server 803.
  • the video conference server 803 receives the video code stream to be transmitted to the display device of the site where the video conference terminal 801 is located, and receives the display device characteristic parameter sent by the video conference terminal 801; the display device characteristic parameter is the video conference terminal.
  • 801 The display capability information of the display device of the site where the 801 is located;
  • the video conference server 803 receives the video code stream to be displayed on the display device of the site where the video conference terminal 802 is located, and receives the display device characteristic parameter sent by the video conference terminal 802.
  • the display device characteristic parameter is the video. Display capability information of the display device of the site where the conference terminal 802 is located;
  • the video conference server 803 obtains the display device characteristic parameter of the site where the video conference terminal is located, and may be any of the following methods:
  • the video conference server 803 obtains the geometric correction parameter and the color correction parameter of the display device of the site where the video conference terminal 801 is located, and extracts the characteristic parameter of the display device of the site where the video conference terminal 801 is located from the geometric correction parameter and the color correction parameter. ;
  • the video conference server 803 obtains the geometric correction parameter and the color correction parameter of the display device of the site where the video conference terminal 802 is located, and extracts the characteristic parameter of the display device of the conference site where the video conference terminal 501 is located from the geometric correction parameter and the color correction parameter;
  • the video conference server 803 receives the display device characteristic parameters sent by the video conference terminal 801 and the video conference terminal 802. Specifically, the video conference server 803 receives the SEI message in the H.263 protocol sent by the video conference terminal. The display device characteristic parameter is carried in the SEI message.
  • the video conference server 803 processes the video code stream sent by the video conference terminal 801 according to the display device characteristic parameter of the video conference terminal 801, and the video conference server 803 determines the characteristic parameter of the display device according to the video conference terminal 802.
  • the video conference terminal 802 sends Transmitting the video code stream for processing;
  • the video conference server 803 separately decodes the received video code stream, and adjusts the video image frame by frame according to each parameter in the characteristic parameter of the display device of the conference site where the video conference terminal 801 is located, and processes the processed video.
  • the code stream is sent to the site where the video conference terminal 801 is located.
  • the video image is adjusted frame by frame according to each parameter in the characteristic parameter of the display device of the site where the video conference terminal 802 is located, and The processed video stream is sent to the conference site where the video conference terminal 802 is located.
  • the system provided by the embodiment of the present invention receives the video code stream to be displayed by the display device to be transmitted to each site, and obtains the characteristic parameters of the display device of the site where each video conference terminal is located, and then according to each video conference terminal
  • the characteristic parameters of the display device of the site adjust the video code streams of the respective video conference terminals.
  • the adjustment of the display device needs to be completed by the human eye, which wastes a lot of manpower, and cannot guarantee that the display effect of the display device of the video conference terminal is always better.
  • the display device provided in the example can perform manual processing on the video image by using the display device characteristic parameter, which can save manpower and can make the display device of different video conference terminals exhibit better display effect.

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Abstract

本发明实施例公开了一种视频图像的适配处理方法、设备及系统,涉及图像处理领域,采用显示设备的特性参数对视频图像进行校正处理,可以节省人力并且可以使不同的远端显示设备呈现较好的显示效果。本发明实施例提供的方案通过接收待传输给第一会场的显示设备进行显示的视频码流,并获取所述第一会场的显示设备的特性参数,然后根据所述第一会场的显示设备的特性参数对所述视频码流进行处理,并将处理之后的视频码流发送给所述第一会场。本发明实施例提供的方案适合针对显示设备的视频图像的适配处理时采用。

Description

视频图像的适配处理方法、 设备及系统 本申请要求于 2011 年 06 月 14 日提交中国专利局、 申请号为 201110159189.5、 发明名称为"视频图像的适配处理方法、 设备及系统"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
本发明涉及图像处理领域, 尤其涉及视频图像的适配处理方法、 设备及 系统。
背景技术
视频会议系统中的远端显示设备通常包括液晶屏显示器、 等离子显示器、 OLED ( Organic Light-Emitting Diode, 有机发光二极管)显示器、 基于投影方 式的平面幕和非平面幕(弧面幕或者折面幕),所述远端显示设备的编码能力、 具体编码协议差别比较大, 现有的多媒体传输控制协议, 如 H.323 协议族中 的 H.245协议、 SIP ( Session Initiation Protocol, 会话初始化协议)协议族中 的 SDP ( Session Description Protocol, 会话初始化协议)协议, 可以完成远端 显示设备之间或者远端显示设备与媒体控制服务器 (如: MCU ( Multipoint Control Unit, 多点控制单元))之间的能力协商, 通过能力协商过程能够了解 对方的处理能力, 进而可以确定双方进行通信时的能力参数, 其中, 能力参 数包括但不限于: 通信双方所采用的编码解码协议, 支持的传输带宽等。
随着远程呈现技术的不断发展, 出现了不同类型的视频会议系统的共同 参加一个会议的应用场景, 在这种应用场景下, 显示设备的显示能力是多样 化的。 为了呈现出完整、 流畅的画面效果, 需要针对具体地远端显示设备做 具体的调节, 例如对多显示屏拼接系统的几何对齐和颜色校正等。 员依靠人眼的判断来完成的, 会浪费较多的人力, 同时也无法保证视频会议 终端的显示设备呈现出的画面效果总是较好。 发明内容
本发明的实施例提供一种视频图像的适配处理方法、 设备及系统, 可以 采用显示设备的特性参数对视频图像进行校正处理, 可以节省人力并且可以 为达到上述目的, 本发明的实施例采用如下技术方案:
一种视频图像的适配处理方法, 应用于视频会议系统中, 所述视频会议 系统包括一个视频会议服务器, 以及至少两个视频会议终端, 其中, 所述的 至少两个视频会议终端分别位于至少两个会场中, 所述方法包括:
所述视频会议服务器接收待传输给第一会场的显示设备进行显示的视频 码流;
所述视频会议服务器获取所述第一会场的显示设备的特性参数, 所述第 一会场的显示设备的特性参数为第一视频会议终端所在的所述第一会场中的 显示设备的显示能力信息;
所述视频会议服务器根据所述第一会场的显示设备的特性参数对所述视 频码流进行处理, 并将处理之后的视频码流发送给所述第一会场。
一种视频图像的适配处理设备, 所述设备应用于视频会议系统中, 包括: 接收单元, 用于接收待传输给第一会场的显示设备进行显示的视频码流; 获取单元, 用于获取所述第一会场的显示设备的特性参数, 所述第一会 场的显示设备的特性参数为第一视频会议终端所在的所述第一会场中的显示 设备的显示能力信息;
执行单元, 用于根据所述第一会场的显示设备的特性参数对所述视频码 流进行处理, 并将处理之后的视频码流发送给所述第一会场。
一种视频会议系统, 包括: 至少两个视频会议终端、 一个视频会议 务 器, 其中, 所述的至少两个视频会议终端分别位于至少两个会场中, 所述系 统包括:
所述视频会议服务器接收待传输给第一会场的显示设备进行显示的视频 码流, 并获取所述第一会场的显示设备的特性参数, 所述第一会场的显示设 备的特性参数为第一视频会议终端所在会场的显示设备的显示能力信息, 所 述视频会议服务器根据所述第一会场的显示设备的特性参数对所述视频码流 进行处理, 并将处理之后的视频码流, 发送给所述第一会场。
本发明实施例提供的一种视频图像的适配处理方法、 设备及系统, 通过 接收待传输给第一会场的显示设备进行显示的视频码流, 并获取第一会场的 显示设备特性参数, 然后根据第一会场的显示设备的特性参数对视频码流进 行处理, 并将处理之后的视频码流发送给第一会场。 与现有技术中不同显示 设备的调节通常是在各个会场中由工程人员依靠人眼的判断来完成的, 会浪 费较多的人力, 同时也无法保证视频会议终端的显示设备呈现出较好的画面 效果相比, 本发明实施例中提供的方案通过采用显示设备特性参数对视频图 现较好的画面效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作筒单地介绍, 显而易见地, 下面 描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的第一种视频会议系统的组成架构图; 图 2为本发明实施例提供的第二种视频会议系统的组成架构图; 图 3为本发明实施例 1提供的一种视频图像的适配处理方法的流程图; 图 4为本发明实施例 1提供的一种视频图像的适配处理设备的框图; 图 5为本发明实施例 2提供的一种视频图像的适配处理方法的流程图; 图 6为本发明实施例 2中采用色调校正曲线插值点数量对图像的像素点 进行插值来调整图像的整体色调所采用的色调校正曲线图;
图 7为本发明实施例 2提供的一种视频图像的适配处理设备的框图; 图 8为本发明实施例 3提供的一种视频会议系统的示意图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而 不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作 出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
不同的显示设备有不同的显示特性, 一张图像在不同的显示设备上进行 显示时, 会导致显示的图像不能达到很好的显示效果。 图像适配指根据不同 的显示设备的特性对图像进行相应的调整, 使得调整后的图像在不同尺寸和 长宽比的显示设备上以较好的效果显示。
在介绍本发明的实施例之前, 先针对本发明所应用的视频会议系统结构 进行说明:
其中, 图 1所示的视频会议系统由媒体控制服务器(以 MCU为例进行说 明), 以及 N (其中, N > 2 )个会议终端构成, 其中, MCU实现媒体流的控 制与转发(包括: 会议音频数据的混音, 以及视频图像的组合等) ;
图 2所示的视频会议系统由 N+1 ( N > 2 )个视频会议终端组成, 其中, 存在一个终端作为主席会议终端 (如下筒称: 主席终端) , 主席终端除了具 有会议终端的功能之外, 还具有媒体控制的部分功能。 主席终端可以通过令 牌控制的方式由各个会议终端向管理台 (图 2未示)进行申请, 获得了该令 牌的会议终端就作为主席终端。
实施例 1
本实施例提供一种视频图像的适配处理方法, 如图 3 所示, 应用于视频 会议系统中, 该视频会议系统包括至少两个视频会议终端, 其中, 至少两个 视频会议终端分别位于至少两个会场中, 该方法包括:
301 , 接收待传输给第一会场显示设备进行显示的视频码流;
在具体实现的过程中, 301中的第一会场为参加视频会议中的不特定的一 个会场。
302, 获取所述第一会场的显示设备的特性参数, 所述第一会场的显示设 备的特性参数为第一视频会议终端所在的所述第一会场中的显示设备的显示 能力信息;
第一会场的显示设备的特性参数的获取方式可以有至少如下两种: 方式一: 获取第一会场中的显示设备的几何校正参数和颜色校正参数; 从所述几何校正参数和颜色校正参数中提取显示设备特性参数;
方式二: 接收第一会场中的视频会议终端发送的显示设备特性参数。 需要说明的是, 上述步骤 301和步骤 302的顺序并不是严格固定的, 在 具体的实现过程中, 可以先执行 302, 再执行 301 ; 或者先执行 301 , 再执行 302; 抑或者 301与 302同时执行, 对此, 本发明的实施例中不加任何限定。
303 , 根据所述第一会场的显示设备的特性参数对所述视频码流进行处 理, 并将处理之后的视频码流发送给所述第一会场。
根据第一会场的显示设备的特性参数对所述视频码流进行处理可以具体 为, 首先解码接收待传输给第一会场的显示设备进行显示的视频码流, 获得 视频图像, 然后根据第一会场的显示设备特性参数中的每个参数对所述视频 图像进行逐帧调整; 还可以采用对解码之后的视频图像, 根据第一会场的显 示设备的特性参数的参数组合对视频图像进行逐帧调整, 在具体应用中还可 以采用其他方式, 对此, 本发明的实施例不加限定。 可以是 MCU设备(如图 1所示), 也可以为集成了视频图像适配处理模块的 视频会议终端(如图 2所示的视讯会议系统中的主席终端), 对此, 本发明的 实施例不加限定。
本发明实施例提供的视频图像的适配处理方法, 通过接收待传输给第一 会场的显示设备进行显示的视频码流, 并获取第一会场的显示设备特性参数, 然后根据第一会场的显示设备的特性参数对视频码流进行处理, 并将处理之 后的视频码流发送给第一会场。 与现有技术中不同的显示设备的调节通常是 在各个会场中的工程人员依靠人眼的判断来完成的, 会浪费较多的人力, 同 时也无法保证视频会议终端的显示设备呈现出较好的画面效果相比, 本发明 实施例中提供的方案通过采用各个视频会议终端的显示设备特性参数对视频 图像进行校正处理, 可以节省人力并且可以使不同的视频会议终端的显示设 备呈现较好的画面效果。
为了实现上述一种视频图像的适配处理方法, 本实施例还提供一种进行 视频图像的适配处理的设备, 该设备可以为视频会议服务器, 如 MCU设备, 也可以为集成了视频图像适配处理模块的视频会议终端, 如图 4所示, 该设 备包括: 接收单元 401 , 获取单元 402, 执行单元 403。
接收单元 401 , 用于接收待传输给第一会场显示设备进行显示的视频码 流;
获取单元 402, 用于获取所述第一会场的显示设备的特性参数, 所述第一 会场的显示设备的特性参数为第一视频会议终端所在的所述第一会场中的显 示设备的显示能力信息;
具体地, 获取单元 402获取第一会场的显示设备的特性参数时, 可以通 过获取模块获取所述第一会场中的显示设备的几何校正参数和颜色校正参 数, 然后提取模块从所述几何校正参数和颜色校正参数中提取显示设备特性 参数; 也可以通过接收模块, 接收所述第一会场中的视频会议终端发送的显 示设备特性参数; 对此, 本发明的实施例不加限定。
执行单元 403,用于根据所述第一会场的显示设备的特性参数对所述视频 码流进行处理, 并将处理之后的视频码流发送给所述第一会场。
具体地, 执行单元 403中的解码模块解码所述视频码流, 获得视频图像, 然后调整模块, 根据所述第一会场的显示设备特性参数中的每个参数对所述 视频图像进行逐帧调整, 还可以采用对解码之后的视频图像, 根据第一会场 的显示设备的特性参数的参数组合对视频图像进行逐帧调整, 在具体应用中 还可以采用其他方式, 对此, 本发明的实施例不加限定。
本发明实施例提供的设备, 通过接收单元接收待传输给第一会场的显示 设备进行显示的视频码流, 并用获取单元获取第一会场的显示设备特性参数, 然后采用执行单元根据第一会场的显示设备特性参数对视频码流进行处理, 并将处理之后的视频码流发送给所述第一会场。 与现有技术中显示设备的调 节通常是在各个会场中的工程人员依靠人眼的判断来调整的, 会浪费较多的 人力, 同时也无法保证视频会议终端的显示设备呈现出的画面效果总是达到 较好相比, 本发明实施例中提供的各个视频会议终端的显示设备通过采用显 示设备特性参数对视频图像进行校正处理, 可以节省人力并且可以使不同的 视频会议终端的显示设备呈现较好的画面效果。
此外, 本发明实施例还提供一种视频会议系统, 所述系统由至少两个视 频会议终端、 以及一个视频会议服务器所构成, 其中, 所述的至少两个视频 会议终端分别位于至少两个会场中, 所述系统包括;
所述视频会议服务器接收待传输给第一会场的显示设备进行显示的视频 码流, 并获取所述第一会场的显示设备的特性参数, 所述第一会场的显示设 备的特性参数为第一视频会议终端所在会场的显示设备的显示能力信息, 所 述视频会议服务器根据所述第一会场的显示设备的特性参数对所述视频码流 进行处理, 并将处理之后的视频码流, 发送给所述第一会场。
具体地, 视频会议服务器获取第一会场的显示设备的特性参数时, 可以 获取第一会场中的显示设备的几何校正参数和颜色校正参数, 并从所述几何 校正参数和颜色校正参数中提取显示设备特性参数;
或者, 所述视频会议服务器接收所述第一会场中的视频会议终端发送的 显示设备特性参数。
视频会议服务器根据第一会场的显示设备的特性参数对所述视频码流进 行处理, 并将处理之后的视频码流, 发送给第一会场, 具体地, 视频会议服 务器解码接收到的视频码流, 获得视频图像, 根据第一会场中的显示设备的 特性参数中的每个参数对该视频图像进行逐帧调整。
本发明实施例提供的视频会议系统中有至少两个视频会议终端, 因此需 要获取不同的会场的显示设备的特性参数, 对待传输给相应会场的显示设备 进行显示的视频码流进行处理。 这里, 为了筒单描述和方便理解, 是以第一 会场 (视讯会议系统中的不特定的会场) 为例进行描述。 本发明实施例提供的视频会议系统, 通过视频会议服务器接收待传输给 第一会场的显示设备进行显示的视频码流, 并获取第一会场的显示设备特性 参数, 根据显示设备特性参数对视频码流进行调整。 与现有技术中显示设备 的调节通常是在各个会场中的工程人员依靠人眼的判断来完成的, 会浪费较 多的人力, 同时也无法保证视频会议终端的显示设备呈现出的画面效果达到 较好相比, 本发明实施例中提供的各个会场的显示设备通过采用显示设备特 性参数对视频图像进行校正处理, 可以节省人力并且可以使不同的视频会议 终端的显示设备呈现较好的画面效果。
实施例 2
本发明实施例提供一种视频图像的适配处理方法, 应用于视频会议系统 中, 该视频会议系统包括一个视频会议服务器, 以及至少两个视频会议终端, 其中, 所述的至少两个视频会议终端分别位于至少两个会场中, 需要说明的 是, 本发明实施例提供的方案以视频会议终端所在的第一会场为例进行描述 视频会议系统调整的方法。
如图 5所示, 该方法包括:
在本发明实施例提供的视频图像的适配处理之前, 需要调试人员对各个 会场中的显示设备进行初步地调试, 使得显示设备的显示效果调试到几何上 尽量对齐, 颜色上尽量接近, 使后续的操作效率提高。
步骤 501 ,所述视频会议服务器接收待传输给第一会场的显示设备进行显 示的视频码流;
视频会议服务器可以为 MCU, 也可以为集成了视频图像适配处理模块的 视频会议终端(即图 2所示的主席终端), 视频会议终端将需要调整的视频码 流发送给视频会议服务器。
步骤 502,获取所述第一会场中的显示设备的几何校正参数和颜色校正参 数;
具体地, 视频会议服务器发送几何校正模板图像到视频会议终端进行显 示, 几何校正模板图像保存在视频会议服务器上, 视频会议终端拍摄所述几 何校正模板图像在视频会议终端所在的会场中的显示设备上的效果图像, 并 将拍摄的图像回传给视频会议服务器, 视频会议服务器根据回传的图像计算 几何校正参数;
视频会议服务器判断计算出的几何校正参数的误差是否满足精度要求, 如果满足精度要求, 则采用计算出的几何校正参数对几何校正模板图像进行 校正后, 在视频会议终端所在的会场的显示设备上的显示效果较好, 如果不 满足精度要求, 则采用计算出的几何校正参数对几何校正模板图像进行校正 后, 在视频会议终端所在的会场的显示设备上的显示效果不好, 例如在视频 会议终端所在的会场的显示设备上显示时存在拼接区域, 此时需要视频会议 服务器的计算过程进行多次迭代, 继续将几何校正处理后的模板图像发送到 视频会议终端所在的会场的显示设备上进行显示, 视频会议终端拍摄显示屏 幕上的效果图像, 并回传给视频会议服务器, 进行再次计算, 依次迭代, 直 到计算出的几何校正参数的误差满足精度要求, 则采用计算出的几何校正参 数对几何校正模板图像进行校正后, 这样视频会议终端所在的会场的显示设 备上的显示效果较好;
同理, 视频会议服务器发送颜色校正模板图像到视频会议终端进行显示, 颜色校正模板图像保存在视频会议服务器, 视频会议终端拍摄所述颜色校正 模板图像在视频会议终端所在的会场中的显示设备上的效果图像, 并将拍摄 的图像回传给视频会议服务器, 视频会议服务器根据拍摄的图像计算颜色校 正参数;
视频会议服务器判断计算出的颜色校正参数的误差是否满足精度要求, 如果满足精度要求, 则采用计算出的颜色校正参数对颜色校正模板图像进行 校正后, 在视频会议终端所在的会场的显示设备上的显示效果较好, 如果不 满足精度要求, 则采用计算出的颜色校正参数对颜色校正模板图像进行校正 后, 在视频会议终端所在的会场的显示设备上的显示效果不好, 例如在视频 会议终端所在的会场的显示设备上显示时存在过亮区域, 此时需要视频会议 服务器的计算过程进行多次迭代, 继续将颜色校正处理后的模板图像发送到 视频会议终端所在的会场的显示设备上进行显示, 视频会议终端拍摄显示屏 幕上的效果图像, 并回传给视频会议服务器, 视频会议服务器可以再次计算, 依次迭代, 直到计算出的颜色校正参数的误差满足精度要求, 则采用计算出 的颜色校正参数对颜色校正模板图像进行校正后, 这样视频会议终端所在的 会场的显示设备上的显示效果较好。
需要说明的是, 还需要获取其他会场中的显示设备的几何校正参数和颜 色校正参数。
步骤 503 ,所述视频会议服务器从所述几何校正参数和颜色校正参数中提 述第一会场中的显示设备的显示能力信息;
所述显示设备特性参数包括: 是否进行后续的处理的标识, 图像水平分 辨率、 图像垂直分辨率、 图像位深、 几何校正标记、 几何校正参数、 图像亮 度调整操作标记、 图像亮度调整系数。
具体地, "是否进行后续的处理的标识"表示视频图像是否需要采用显示 设备的特性参数进行逐帧调整;
"图像水平分辨率"表示第一会场的显示设备显示的图像的水平分辨率, "图像垂直分辨率 "表示第一会场的显示设备显示的图像的垂直分辨率;
"图像位深" 表示存储每个像素所用的位数, 确定彩色图像的每个像素 可能有的颜色数, 例如每个像素用 8位表示, 即所述图像位深为 8, 则最大颜 色数目为 28, 即 256种颜色数;
"几何校正标记" 表示显示设备特性参数中是否包含 "几何校正参数"; 当显示屏幕是由多个屏幕构成时, 相邻图像间可能产生重叠, 将会导致 重叠部分图像的亮度较高, 这时, 需要应用图像亮度调整校正图像, 使得整 个屏幕呈现亮度一致的图像, "图像亮度调整操作标记" 表示图像是否需要进 行图像亮度调整处理;
为了应用显示设备特性参数对视频图像进行处理, 使视频图像达到较好 的显示效果, 显示设备特性参数还包括: 矩阵颜色校正标记、 矩阵颜色校正 参数、 色调校正标记、 色调校正曲线插值点数量、 3D-LUT ( Three Dimensions-Look-Up-Table , 三维显示查找表)颜色校正标记, 3D-LUT 中网 格点间隔、 3D-LUT中网格点数据。
矩阵颜色校正是指需要校正前和校正后的两个图像之间存在的关系, 可 以用一个 3*3 的矩阵表示, 使得对校正前的图像应用所述矩阵颜色校正参数 后, 得到较好的颜色校正, "矩阵颜色校正标记" 表示所述图像是否需要进行 矩阵颜色校正, 如果需要对图像进行矩阵颜色的校正, 则采用矩阵颜色校正 参数对图像进行逐帧的校正;
色调为色与色之间的整体关系构成的颜色 Ρ介调, 指图像色彩的总体倾向, "色调校正标记" 表示所述图像是否需要进行色调校正; 当色调校正标记表 示需要对图像进行色调校正时, 读取相应的色调校正曲线插值点数量对图像 的像素点进行插值来调整图像的整体色调;
3D-LUT颜色校正是对不能用所述矩阵颜色校正参数进行处理的图像进 行图像处理的一种方法, 具体地, 是一种根据三维显示查找表, 通过插值对 图像进行校正的色彩校正方法, 可以提高色彩校正精度, "3D-LUT颜色校 正标记" 表示图像是否需要进行 3D-LUT颜色校正, 如果需要对图像进行 3D-LUT颜色校正,则读取 3D-LUT中网格点间隔和 3D-LUT中网格点数据两 个参数, 并采用这两个参数对图像进行调整。
步骤 502和步骤 503为获取视频会议终端所在的会场的显示设备特性参 数的过程, 获取视频会议终端所在的会场的显示设备特性参数还可以为步骤 需要说明的是, 视频会议服务器接收待传输给第一会场的显示设备进行 显示的视频码流和视频会议服务器获取第一会场的显示设备特性参数这两个 流程的顺序不是严格确定的, 可以先接收待传输给第一会场的显示设备进行 显示的视频码流, 再获取第一会场的显示设备特性参数, 也可以先获取第一 会场的显示设备特性参数, 再接收待传输给第一会场的显示设备进行显示视 频码流, 或者两者同时执行, 对此, 本发明的实施例不加限定。 步骤 504,所述视频会议服务器接收所述第一会场中的视频会议终端发送 的显示设备特性参数;
具体地, 视频会议服务器接收各个会场中的视频会议终端发送的显示设 备特性参数, 视频会议终端根据各自会场的显示设备的特性, 计算得出各自 会场中的显示设备的特性参数, 然后将计算得出的显示设备特性参数携带在 压缩协议 H.263协议中的 SEI ( Supplemental Enhancement Information, 补充 增强信息) 消息中发送给所述服务器, 可以采用 H.263协议中的 SEI消息来 传输用户自定义的信息,本发明实施例中的显示设备特性参数可以在所述 SEI 消息中的数据层中未使用的存储空间, 例如: 可以定义 SEI 消息中的数据层 中的地址为 36的位置至 256的位置中的任意一个位置,优选地,可以定义 SEI 消息中的数据层中的地址为 256 的位置来存放显示设备特性参数,如下表所
Figure imgf000014_0001
上述表中的 Category表示 H.263协议中规定的不同信息的重要性的级别, 在 H.263协议的 SEI消息中 Category的值都为 5,表示对应该值的消息的重要 性稍低, 重要性稍低的消息则可以传送也可以不传送, 在传送过程中丢失后, 也可以不重新传送。
本发明实施例中的显示设备特性参数在 SEI信息中的码流结构如下表所 Display_Device_param(payloadSize){ 描述符
skip—flag unsigned (1)
width unsigned (12)
height unsigned (12)
b it_dep th_minu s 8 unsigned (4)
skip_geometry unsigned (1)
int i
for (i=0; i<width*height; i++)
geometr y_tr an [i] unsigned (32)
skip—blend unsigned (1)
blend_data_depth_minusl unsigned (4)
for (i=0; width*height; i++)
blend[i] unsigned (8)
skip—color—matrix unsigned (1)
for (i=0; i<9;i++)
color_matrix[i] unsigned (8)
skip—tone—mapping unsigned (1)
for (j=0;j<3; j++)
number_pivots[j] unsigned (12)
for (i=0;i< number—pivots [j]; i++)
coded_pivot_value[i] unsigned (12)
target_pivot_value[i] unsigned (12)
skip_color_lut unsigned (1)
step unsigned (8)
color_lut_pivot_number = 3 * ( 1 «BitDepth)/step
for (i=0; i<color_lut_pivot_number;
color _lu t_p ivot [i] unsigned
(bit_depth_minus8+8)
}
上述表中描述符的 Unsigned ( 12 )表示显示特性参数占用的比特位数为 无符号的 12比特, Unsigned( 8 )、 Unsigned (1), U nsigned (32)的意义与 Unsigned (12)相同, 黑体部分表示实际存在于视频码流中的显示设备特性参数元素, 非 黑体部分为解码过程中的辅助变量。
步骤 505 ,所述视频会议服务器根据所述第一会场的显示设备的特性参数 对所述视频码流进行处理, 并将处理之后的视频码流发送给所述第一会场; 具体地, 先将接收到的视频码流进行解码, 获得视频图像, 根据显示设 备的特性参数对视频图像进行调整。
依次解析显示设备特性参数, 显示设备特性参数中, 规定给是否进行后 续的处理的标识的赋值为 0或者 1 ,如果是否进行后续的处理的标识的赋值为 0, 则表示图像不需要进行后续的处理, 停止解析显示设备特性参数, 如果是 否进行后续的处理的标识的赋值为 1 , 则表示图像需要进行后续的处理, 如果 是否进行后续的处理的标识的赋值为 1 , 然后读取图像水平分辨率、 图像垂直 分辨率、 图像位深这三个参数, 并根据图像水平分辨率、 图像垂直分辨率、 图像位深确定图像亮度调整系数;
规定给几何校正标记的赋值为 0或者 1 , 读取几何校正标记, 如果几何校 正标记的赋值为 0, 则表示不需要进行几何校正, 此时, 进入图像亮度调整的 流程, 如果几何校正标记的赋值为 1 , 则表示显示设备特性参数中包含几何校 正参数, 对图像进行相应的处理;
进一步地, 采用几何校正参数对图像进行几何校正时, 例如, 每个像素 的数据长度为 32bit,其中, 32bit数据中高 16bit为水平方向校正数据,低 16bit 为垂直方向校正数据, 每个 16bit数据中高 13bit为整数部分, 低 3bit为小数 部分, 因此精度为 1/8像素。
设原图像为 I,原图像的像素的水平坐标 X。,垂直坐标为 Y。,水平校正值为 dx,垂直校正值为 dy , 则原图像的像素校正后的像素值为 I ( X。,Y。) = I(X0+dx,Y0+dy);
规定给图像亮度调整操作标记的赋值为 0或者 1 ,读取图像亮度调整操作 标记, 如果图像亮度调整操作标记的赋值为 0, 则表示图像不需要进行图像亮 度调整处理, 此时, 进入矩阵颜色校正的流程, 如果图像亮度调整操作标记 的赋值为 1 ,则读取图像亮度调整系数根据确定的图像亮度调整系数对图像进 行亮度调整处理;
进一步地,采用图像亮度调整系数对图像进行亮度调整时,设原图像为 I, 原图像的像素的水平坐标 X。,垂直坐标为 Y。,原图像中需要进行亮度调整的位 置的亮度调整系数为 blend(x0,y0),则校正后的数据为 I(X0,Y0) = Ι(Χ00)* blend(x0,y0);
规定给矩阵颜色校正标记的赋值为 0或者 1 ,读取矩阵颜色校正标记, 如 果矩阵颜色校正标记的赋值为 0, 则表示图像不需要进行矩阵颜色校正处理, 此时, 进入色调校正的流程, 如果矩阵颜色校正标记的赋值为 1 , 则读取矩阵 颜色校正系数根据确定的矩阵颜色校正系数对图像进行颜色调整处理;
进一步地, 例如对需要显示的视频图像进行矩阵颜色校正调整时, 根据 矩阵颜色校正系数进行调整, 操作过程为:
Figure imgf000017_0001
G1=h21*R0+h22*Go+h23*B0, ②
B1=h31*Ro+h32*Go+h33*B0, ③
其中, [R。, Go, Β。]τ为校正前某一点的像素值, [ , d, 为校正后 某一点的像素值, hn, h12, h13, h21, h22, h23, h31, h32, h33为调整图像颜 色的字段中的元素, 为生产厂家根据图像传感器的不同设置的。
可以规定其中每一个颜色校正数据长度为 32位, 最高 24位为整数部分, 低 8位为小数部分, 这样浮点数的精度为 1/256。
对视频图像进行处理时, 视频会议终端的校正设备获取校正前的 A点的 像素值, 根据上述①, ②, ③三个计算公式可以获得校正后的 A点的像素值, 将获得的校正后的 A点的像素值对视频图像进行调整。 同理, 对视频图像的 每一帧中的图像的所有像素值都进行这样的调整后, 即可获得调整后的视频 图像;
规定给色调校正标记的赋值为 0或者 1 , 读取色调校正标记, 如果色调校 正标记的赋值为 0,则表示图像不需要进行色调校正处理,此时,进入 3D-LUT 颜色校正的流程, 如果色调校正标记的赋值为 1 , 则读取色调校正曲线插值点 数量根据确定的色调校正曲线插值点数量对图像的像素点进行插值来调整图 像的整体色调;
进一步地, 采用色调校正曲线插值点数量对图像的像素点进行插值来调 整图像的整体色调时, 设某一像素的红色分量为 R1 校正后的红色分量为 R。, 则校正过程为:
Figure imgf000018_0001
该曲线的生成方法如图 6所示, 其中 F即为色调校 正曲线, il,i2对应的结果分别为 ol,o2, 色调校正曲线 F在 il , i2之间的部分 由 (il,ol),(i2,o2)经过线性插值得到; 校正数据中的校正前颜色对应于 i, 校正 后颜色对应于 0 ;
规定给 3D-LUT颜色校正标记的赋值为 0或者 1 ,读取 3D-LUT颜色校正 标记,如果 3D-LUT颜色校正标记的赋值为 0,则表示图像不需要进行 3D-LUT 颜色校正处理, 退出解析流程, 如果 3D-LUT颜色校正标记的赋值为 1 , 则读 取 3D-LUT中网格点间隔和 3D-LUT中网格点数据 color_lut_pivot两个参数, 并采用这两个参数对图像进行调整;
进一步地, 设原图像为 I, 原图像的像素的水平坐标 x。,垂直坐标为 y。, 原 图像的像素的红绿蓝分量分别为 R、 G、 B; 则经过 3D-LUT校正后的数据为: I(x0,y0) = color_lut_pivot[R/step] [G/step] [B/step] , 对于 R/step G/step B/step不为 整数的情况, 采用 4面体插值方法, 关于 4面体插值方法为现有技术, 本发 明的实施例不作限定。
这样, 对全部的显示设备特性参数解析完成后, 退出解析流程, 此时, 经采用显示设备特性参数调整后的视频图像, 可以在显示设备上呈现出完成 流畅的画面。 调节, 使显示设备特性参数对视频图像校正调整后, 可以在显示设备上呈现 出完成流畅的画面。
视频会议终端所在会场中的显示设备可以为不同的显示设备, 可以是显 示设备的数量不同, 可以是显示设备的类型不同, 也可以是特定类型的屏幕, 例如显示设备可以为一块液晶屏, 可以为三块液晶屏拼接成平面; 显示设备 可以是传统 CRT ( Cathode Ray Tube, 使用阴极射线管的显示器), 可以是液 晶的; 显示设备可以是平面幕、 折面幕、 弧幕等, 视频会议终端接收到编码 的逐帧调整后的视频码流, 进行解码后显示在该视频会议终端所在的会场的 显示设备上, 可以呈现出完成流畅的画面。 本发明实施例提供的视频图像的适配处理方法, 通过接收待传输给第一 会场的显示设备进行显示的视频码流, 并获取第一会场的显示设备特性参数, 根据显示设备特性参数对视频码流进行调整, 并将调整后的视频图像在视频 会议终端上的显示设备上进行显示。 与现有技术中通常依靠人眼来调节显示 设备, 会浪费较多的人力, 同时也无法保证视频会议终端的显示设备呈现出 的画面效果总是达到较好相比, 本发明实施例中提供的方案通过采用显示设 备特性参数对视频图像进行逐帧的校正处理, 可以节省人力, 并且可以使不 同的视频会议终端的显示设备呈现较好的画面效果。
为了实现上述视频图像的适配处理方法, 本发明实施例提供一种视频图 像的适配处理设备, 该设备为视频会议服务器, 具体可以是 MCU, 也可以为 集成了具有视频图像适配处理模块的视频会议终端。 如图 7所示, 该设备包 括: 接收单元 701 , 获取单元 702, 获取模块 703,提取模块 704, 接收模块 705, 执行单元 706, 解码模块 707, 调整模块 708。
接收单元 701 , 用于接收待传输给第一会场的显示设备进行显示视频码 流;
获取单元 702, 用于获取所述第一会场的显示设备的特性参数, 所述第一 会场的显示设备的特性参数为第一视频会议终端所在的所述第一会场中的显 示设备的显示能力信息;
显示设备的特性参数为根据第一会场中的显示设备的具体特性计算出来 的特性参数, 显示设备的特性参数包括: 是否进行后续的处理的标识, 图像 水平分辨率、 图像垂直分辨率、 图像位深、 几何校正标记、 几何校正参数、 图像衰减操作标记、 图像衰减系数, 还包括: 矩阵颜色校正标记、 矩阵颜色 校正参数、色调校正标记、 色调校正曲线插值点数量、 3D-LUT颜色校正标记, 3D-LUT中网格点间隔、 3D-LUT中网格点数据。
获取单元 702包括: 获取模块 703,用于获取所述第一会场中的显示设备 的几何校正参数和颜色校正参数; 提取模块 704, 用于从所述几何校正参数和 颜色校正参数中提取显示设备特性参数; 或者, 获取单元 702中的接收模块 705, 用于接收所述第一会场中的视频 会议终端发送的显示设备特性参数; 此时, 视频会议终端将其所在会场中的 各自的显示设备的特性参数计算得出后, 发送给视频会议服务器。
接收模块 705具体用于: 接收所述第一会场中的视频会议终端发送的基 于 H.263协议中的补充增强消息 SEI消息, 所述 SEI消息中携带所述显示设 备特性参数。
获取显示设备特性参数后, 执行单元 706, 用于根据所述第一会场的显示 设备的特性参数对所述视频码流进行处理, 并将处理之后的视频码流发送给 所述第一会场。
执行单元 706中的解码模块 707,用于解码接收到的所述视频会议终端发 送的所述视频码流, 获得视频图像;
执行单元 706中的调整模块 708,用于根据所述第一会场的显示设备特性 参数中的每个参数对所述视频图像进行逐帧调整。
本发明实施例提供的装置, 以根据第一会场的显示设备特性参数, 处理 会议中接收到的视频码流为例进行描述的, 具体地, 需要接收各个会场的显 示设备特性参数, 处理会议中接收到的视频码流, 并将处理之后的视频码流 发送给各个会场。
本发明实施例提供的设备, 通过接收单元接收待传输给第一会场的显示 设备进行显示的视频码流, 然后获取单元获取第一会场的显示设备的特性参 数, 根据第一会场的显示设备特性参数对视频码流进行调整后发送给第一会 场。 与现有技术中显示设备的调节通常是依靠人眼的判断来完成的, 会浪费 比较多的人力, 同时也无法保证视频会议终端的显示设备呈现出的显示效果 总是达到较好相比, 本发明实施例中提供的显示装置通过采用各个会场的显 示设备特性参数对视频图像进行校正处理, 从而使校正后的视频图像可以适 配不同的视频会议终端的显示设备, 使显示设备呈现出完整流畅的画面, 并 且会节省人力。
实施例 3 上述视频图像的适配处理方法、 设备可以应用到图像处理领域, 从而形 成一种视频会议系统, 以便能够实现上述方法, 如图 8所示, 该视频会议系 统包括: 视频会议终端 801、 视频会议终端 802 (视频会议终端至少 2个)、 一个视频会议服务器 803。
视频会议服务器 803接收待传输给视频会议终端 801所在的会场的显示 设备进行显示的视频码流, 并接收视频会议终端 801发送的显示设备特性参 数; 所述显示设备特性参数为所述视频会议终端 801 所在的会场的显示设备 的显示能力信息;
并且, 视频会议服务器 803接收待传输给视频会议终端 802所在的会场 的显示设备进行显示的视频码流, 并接收视频会议终端 802发送的显示设备 特性参数; 所述显示设备特性参数为所述视频会议终端 802所在的会场的显 示设备的显示能力信息;
视频会议服务器 803获取视频会议终端所在会场的显示设备特性参数可 以为以下任一种方式:
方式一: 视频会议服务器 803获取视频会议终端 801所在会场的显示设 备的几何校正参数、 颜色校正参数, 并从该几何校正参数和颜色校正参数中 提取视频会议终端 801所在会场的显示设备的特性参数;
视频会议服务器 803获取视频会议终端 802所在会场的显示设备的几何 校正参数、 颜色校正参数, 并从该几何校正参数和颜色校正参数中提取视频 会议终端 501所在会场的显示设备的特性参数;
方式二:视频会议服务器 803接收视频会议终端 801和视频会议终端 802 发送的显示设备特性参数, 具体地, 所述视频会议服务器 803接收所述视频 会议终端发送的 H.263协议中的 SEI消息, 所述 SEI消息中携带所述显示设 备特性参数。
视频会议服务器 803根据视频会议终端 801的所述显示设备特性参数对 所述视频会议终端 801 发送的所述视频码流进行处理, 视频会议服务器 803 根据视频会议终端 802的所述显示设备特性参数对所述视频会议终端 802发 送的所述视频码流进行处理;
具体地, 视频会议服务器 803分别解码接收到的视频码流, 根据视频会 议终端 801 所在会场的显示设备的特性参数中的每个参数对所述视频图像进 行逐帧调整, 并将处理之后的视频码流, 发送给所述视频会议终端 801 所在 的会场; 同理, 根据所述视频会议终端 802所在会场的显示设备的特性参数 中的每个参数对所述视频图像进行逐帧调整, 并将处理之后的视频码流, 发 送给所述视频会议终端 802所在的会场。
本发明实施例提供的系统, 通过视频会议服务器接收待传输给各个会场 的显示设备进行显示的视频码流, 并获取各个视频会议终端所在会场的显示 设备的特性参数, 然后根据各个视频会议终端所在会场的显示设备的特性参 数对相应的各个视频会议终端的视频码流进行调整。 与现有技术中对显示设 备的调整需要依靠人眼来完成, 会浪费较多的人力, 同时也无法保证视频会 议终端的显示设备呈现出的显示效果总是达到较好相比, 本发明实施例中提 供的显示装置通过采用显示设备特性参数对视频图像进行逐帧的校正处理, 可以节省人力并且可以使不同的视频会议终端的显示设备呈现较好的显示效 果。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应所述以权利要求的保护范围为准。

Claims

1、 一种视频图像的适配处理方法, 应用于视频会议系统中, 其特征在于, 所述视频会议系统包括至少两个视频会议终端, 其中, 所述的至少两个视频会 议终端分别位于至少两个会场中, 所述方法包括:
接收待传输给第一会场的显示设备进行显示的视频码流;
获取所述第一会场的显示设备的特性参数, 所述第一会场的显示设备的特 性参数为第一视频会议终端所在的所述第一会场中的显示设备的显示能力信 根据所述第一会场的显示设备的特性参数对所述视频码流进行处理, 并将 处理之后的视频码流发送给所述第一会场。
2、 根据权利要求 1所述的视频图像的适配处理方法, 其特征在于, 所述获 取所述第一会场的显示设备的特性参数, 包括:
获取所述第一会场中的显示设备的几何校正参数和颜色校正参数; 从所述 几何校正参数和颜色校正参数中提取显示设备特性参数;
或者, 接收所述第一会场中的视频会议终端发送的显示设备特性参数。
3、 根据权利要求 1或 2所述的视频图像的适配处理方法, 其特征在于, 所 述根据第一会场的显示设备的特性参数对所述视频码流进行处理包括:
解码所述视频码流, 获得视频图像;
根据所述第一会场的显示设备特性参数中的每个参数对所述视频图像进行 逐帧调整。
4、 根据权利要求 1-3中任一项所述的视频图像的适配处理方法, 其特征在 于, 所述显示设备特性参数包括至少如下一个参数: 图像水平分辨率、 图像垂 直分辨率、 图像位深、 几何校正参数、 图像亮度调整系数。
5、 根据权利要求 2或 4所述的视频图像的适配处理方法, 其特征在于, 所 述接收所述第一会场中的视频会议终端发送的显示设备特性参数包括:
接收所述第一会场中的视频会议终端发送的基于 H.263 协议中的补充增强 消息 SEI消息, 所述 SEI消息中携带所述显示设备特性参数。
6、 一种视频图像的适配处理设备, 所述设备应用于视频会议系统中, 其特 征在于, 包括:
接收单元, 用于接收待传输给第一会场的显示设备进行显示的视频码流; 获取单元, 用于获取所述第一会场的显示设备的特性参数, 所述第一会场 的显示设备的特性参数为第一视频会议终端所在的所述第一会场中的显示设备 的显示能力信息;
执行单元, 用于根据所述第一会场的显示设备的特性参数对所述视频码流 进行处理, 并将处理之后的视频码流发送给所述第一会场。
7、 根据权利要求 6所述的设备, 其特征在于, 所述获取单元包括: 获取模块, 用于获取所述第一会场中的显示设备的几何校正参数和颜色校 正参数; 提取模块, 用于从所述几何校正参数和颜色校正参数中提取显示设备 特性参数;
或者, 接收模块, 用于接收所述第一会场中的视频会议终端发送的显示设 备特性参数。
8、 根据权利要求 6或 7所述的设备, 其特征在于, 所述执行单元包括: 解码模块, 用于解码所述视频码流, 获得视频图像;
调整模块, 用于根据所述第一会场的显示设备特性参数中的每个参数对所 述视频图像进行逐帧调整。
9、 根据权利要求 7或 8中任一项所述的设备, 其特征在于, 所述接收模块 具体用于:
接收所述第一会场中的视频会议终端发送的基于 H.263 协议中的补充增强 消息 SEI消息, 所述 SEI消息中携带所述显示设备特性参数。
10、 一种视频会议系统, 其特征在于, 包括: 至少两个视频会议终端、 一 个视频会议服务器, 其中, 所述至少两个视频会议终端分别位于至少两个会场 中, 所述系统包括:
所述视频会议服务器接收待传输给第一会场的显示设备进行显示的视频码 流, 并获取所述第一会场的显示设备的特性参数, 所述第一会场的显示设备的 特性参数为第一视频会议终端所在会场的显示设备的显示能力信息, 所述视频 会议服务器根据所述第一会场的显示设备的特性参数对所述视频码流进行处 理, 并将处理之后的视频码流, 发送给所述第一会场。
11、 根据权利要求 10所述的视频会议系统, 其特征在于, 所述获取第一会 场的显示设备的特性参数包括:
所述视频会议服务器获取所述第一会场中的显示设备的几何校正参数和颜 色校正参数, 并从所述几何校正参数和颜色校正参数中提取显示设备特性参数; 或者, 所述视频会议服务器接收所述第一会场中的视频会议终端发送的显 示设备特性参数。
12、 根据权利要求 10或 11所述的视频会议系统, 其特征在于, 所述视频 会议服务器根据所述第一会场的显示设备的特性参数对所述视频码流进行调整 包括:
所述视频会议服务器解码所述视频码流, 获得视频图像, 根据所述第一会 场中的显示设备的特性参数中的每个参数对所述视频图像进行逐帧调整。
13、 根据权利要求 11或 12所述的视频会议系统, 其特征在于, 所述视频 会议服务器接收所述第一会场中的视频会议终端发送的显示设备特性参数包 括:
所述视频会议服务器接收所述第一会场中的视频会议终端发送的基于 H.263协议中的 SEI消息, 所述 SEI消息中携带所述显示设备特性参数。
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