CN111601123A - Color space conversion method and LED movie screen - Google Patents
Color space conversion method and LED movie screen Download PDFInfo
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- CN111601123A CN111601123A CN202010413701.3A CN202010413701A CN111601123A CN 111601123 A CN111601123 A CN 111601123A CN 202010413701 A CN202010413701 A CN 202010413701A CN 111601123 A CN111601123 A CN 111601123A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012545 processing Methods 0.000 claims description 8
- 239000000872 buffer Substances 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
The invention discloses a color space conversion method and an LED movie screen, belonging to the field of digital movie playing. The invention provides a color space conversion method and an LED movie screen, which can effectively convert the color space of a digital movie so that the digital movie can be played on the LED screen.
Description
Technical Field
The invention belongs to the technical field of digital movies, and particularly relates to a color space conversion method and an LED movie screen.
Background
As samsung introduced the first digital cinema projection device based on LED cinema screens in the world, the original traditional cinema projection mode based on projector approach was broken. The LED film screen is a projection device which takes the LED display screen as a display terminal and is integrated with a digital film projection server, and compared with a projector used in the traditional projection mode, the LED film screen has the advantages of high brightness, high contrast, strong expansibility, energy conservation, environmental protection, projection space saving and the like.
The most important condition for the LED movie screen equipment to be able to show cinema movies in theaters is that the LED movie screen equipment passes the international certification standards in the digital cinema field: dci (digital cinema initiatives) specification. In order to develop LED movie screen devices, the DCI specification was initiated by large LED manufacturers in China. Research shows that the LED movie screen equipment has a key technical difficulty to meet the DCI specification requirements, namely that the LED movie screen equipment must be capable of normally playing digital movie sources with X ' Y ' Z ' color spaces required by the DCI specification, but the existing LED display screen products of various domestic LED manufacturers basically do not support the color spaces specially for digital movies.
Disclosure of Invention
The present invention is directed to a method for color space conversion and an LED movie screen, which implement playing of a digital movie on an LED screen by performing color space conversion on the LED movie screen, thereby solving the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method of color space conversion, said method of color space conversion comprising the steps of:
s1, the digital film source to be played is decrypted, unpacked and decompressed through the digital film projection server, and the processed uncompressed image data is transmitted to the sending card;
s2, the sending card receives the uncompressed image data and caches the uncompressed image data;
s3, extracting three vector color values of X ', Y ' and Z ' from each pixel in the cache frame one by one;
s4, carrying out linearization processing on the extracted three vector color values of X ', Y ' and Z ' to generate X, Y, Z three vector color values;
s5, converting X, Y, Z three-vector color values into R, G, B three-vector color values;
s6, carrying out nonlinear processing on R, G, B three-vector color values to generate R ', G ' and B ' three-vector color values;
s7, storing the R ', G ' and B ' three-vector color values into new pixel values;
s8, storing the newly generated pixel value as a frame of new image data;
s9, dividing the newly generated image data by the transmitting card to generate a plurality of partial image data, and transmitting the plurality of partial image data to different receiving cards;
and S10, after receiving the local image data, the receiving card transmits the image signal to the lamp panel and displays the film picture through the lamp panel.
Preferably, in S2, the transmitting card buffers the uncompressed image data in units of frames.
The invention also provides an LED movie screen which is used for performing the color space conversion method to perform color space conversion and playing the digital movie.
The LED movie screen comprises a backpack box and an LED display screen;
the backpack box includes:
the digital film projection server is used for carrying out decryption, unpacking and decompression processing on the digital film source to be played and sending uncompressed image data;
the transmitting card is used for receiving and caching uncompressed image data, generating new image data, dividing the newly generated image data into local image data and distributing the local image data;
the LED display screen comprises at least one box body;
the box body comprises:
the receiving card is used for receiving the local image data distributed by the sending card;
and the lamp panel is used for receiving the local image data and displaying the film picture.
The invention provides a color space conversion method and an LED movie screen, which can effectively convert the color space of a digital movie so that the digital movie can be played on the LED screen.
Drawings
FIG. 1 is a schematic structural diagram of an LED movie screen;
FIG. 2 is a flowchart illustrating an implementation of a color space conversion method.
Detailed Description
The present invention will be further described with reference to the following examples.
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple modifications of the method of the present invention based on the concept of the present invention are within the scope of the claimed invention.
As shown in fig. 1, an LED movie screen comprises a backpack box and an LED display screen;
the backpack box comprises a digital film projection server and a sending card, wherein the digital film projection server is used for decrypting, unpacking and decompressing a digital film source to be played and sending uncompressed image data, and the sending card is connected with the digital film projection server and is used for receiving, caching the uncompressed image data, generating new image data, dividing the newly generated image data into local image data and distributing the local image data;
the LED display screen comprises at least one box body;
the box body comprises a local image which is connected with the sending card and used for receiving the distribution of the sending card and a lamp panel which is connected with the receiving card and used for receiving the local image data and displaying the film picture.
As shown in fig. 2, when the movie is played, the following steps are performed:
s1, the digital film source to be played is decrypted, unpacked and decompressed through the digital film projection server, and the processed uncompressed image data is transmitted to the sending card;
s2, the sending card receives the uncompressed image data and caches the uncompressed image data;
s3, extracting three vector color values of X ', Y ' and Z ' from each pixel in the cache frame one by one;
s4, the extracted three vector color values of X ', Y ' and Z ' are linearized to generate X, Y, Z three vector color values, and the conversion formula is as follows:
s5, converting X, Y, Z three-vector color values into R, G, B three-vector color values, wherein the conversion formula is as follows:
s6, carrying out nonlinear processing on R, G, B three-vector color values to generate R ', G ' and B ' three-vector color values, wherein the conversion formula is as follows:
s7, storing the R ', G ' and B ' three-vector color values into new pixel values;
s8, storing the newly generated pixel value as a frame of new image data;
s9, dividing the newly generated image data by the transmitting card to generate a plurality of partial image data, and transmitting the plurality of partial image data to different receiving cards;
and S10, after receiving the local image data, the receiving card transmits the image signal to the lamp panel and displays the film picture through the lamp panel.
After the LED movie screen performs real-time processing on the digital movie image data in the showing process through the steps, the image data of the digital movie is converted into an R 'G' B 'color space which can be supported by the LED display screen from an X' Y 'Z' color space special for the digital movie, so that the digital movie can be played in the LED movie screen.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A method of color space conversion, said method of color space conversion comprising the steps of:
s1, the digital film source to be played is decrypted, unpacked and decompressed through the digital film projection server, and the processed uncompressed image data is transmitted to the sending card;
s2, the sending card receives the uncompressed image data and caches the uncompressed image data;
s3, extracting three vector color values of X ', Y ' and Z ' from each pixel in the cache frame one by one;
s4, carrying out linearization processing on the extracted three vector color values of X ', Y ' and Z ' to generate X, Y, Z three vector color values;
s5, converting X, Y, Z three-vector color values into R, G, B three-vector color values;
s6, carrying out nonlinear processing on R, G, B three-vector color values to generate R ', G ' and B ' three-vector color values;
s7, storing the R ', G ' and B ' three-vector color values into new pixel values;
s8, storing the newly generated pixel value as a frame of new image data;
s9, dividing the newly generated image data by the transmitting card to generate a plurality of partial image data, and transmitting the plurality of partial image data to different receiving cards;
and S10, after receiving the local image data, the receiving card transmits the image signal to the lamp panel and displays the film picture through the lamp panel.
2. The method for color space conversion and the LED cinema screen according to claim 1, wherein in S2, the transmitting card buffers the uncompressed image data in units of frames.
3. An LED movie screen, characterized in that the LED movie screen is used for performing the method of color space conversion according to any one of claims 1 to 2 and playing digital movies.
4. The LED cinema screen according to claim 3, characterized in that the LED cinema screen comprises a backpack box and an LED display screen;
the backpack box includes:
the digital film projection server is used for carrying out decryption, unpacking and decompression processing on the digital film source to be played and sending uncompressed image data;
the transmitting card is used for receiving and caching uncompressed image data, generating new image data, dividing the newly generated image data into local image data and distributing the local image data;
the LED display screen comprises at least one box body;
the box body comprises:
the receiving card is used for receiving the local image data distributed by the sending card;
and the lamp panel is used for receiving the local image data and displaying the film picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010413701.3A CN111601123A (en) | 2020-05-15 | 2020-05-15 | Color space conversion method and LED movie screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010413701.3A CN111601123A (en) | 2020-05-15 | 2020-05-15 | Color space conversion method and LED movie screen |
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| CN111601123A true CN111601123A (en) | 2020-08-28 |
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| CN202010413701.3A Pending CN111601123A (en) | 2020-05-15 | 2020-05-15 | Color space conversion method and LED movie screen |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117603A (en) * | 2010-01-04 | 2011-07-06 | 青岛海信电器股份有限公司 | Backlight value extraction method and device |
| CN102821285A (en) * | 2012-07-06 | 2012-12-12 | 中影数字巨幕（北京）有限公司 | Digital film playing method and digital film playing system as well as digital film optimizing device |
| US20160117967A1 (en) * | 2014-10-22 | 2016-04-28 | Pixtronix, Inc. | Display incorporating lossy dynamic saturation compensating gamut mapping |
| CN108540781A (en) * | 2017-03-03 | 2018-09-14 | 扬智科技股份有限公司 | Image signal processor and video-signal processing method |
| WO2019035495A1 (en) * | 2017-08-16 | 2019-02-21 | 주식회사 시네마이스터 | Split-in-three digital cinema displaying method and apparatus |
| CN110113590A (en) * | 2019-05-13 | 2019-08-09 | 北京海辰亿华科技有限公司 | A kind of conversion method and device of image color space |
-
2020
- 2020-05-15 CN CN202010413701.3A patent/CN111601123A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117603A (en) * | 2010-01-04 | 2011-07-06 | 青岛海信电器股份有限公司 | Backlight value extraction method and device |
| CN102821285A (en) * | 2012-07-06 | 2012-12-12 | 中影数字巨幕（北京）有限公司 | Digital film playing method and digital film playing system as well as digital film optimizing device |
| US20160117967A1 (en) * | 2014-10-22 | 2016-04-28 | Pixtronix, Inc. | Display incorporating lossy dynamic saturation compensating gamut mapping |
| CN108540781A (en) * | 2017-03-03 | 2018-09-14 | 扬智科技股份有限公司 | Image signal processor and video-signal processing method |
| WO2019035495A1 (en) * | 2017-08-16 | 2019-02-21 | 주식회사 시네마이스터 | Split-in-three digital cinema displaying method and apparatus |
| CN110113590A (en) * | 2019-05-13 | 2019-08-09 | 北京海辰亿华科技有限公司 | A kind of conversion method and device of image color space |
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