WO2012162079A4 - Digital rack interface pod system and method incorporating lossless, partial video refresh feature - Google Patents
Digital rack interface pod system and method incorporating lossless, partial video refresh feature Download PDFInfo
- Publication number
- WO2012162079A4 WO2012162079A4 PCT/US2012/038293 US2012038293W WO2012162079A4 WO 2012162079 A4 WO2012162079 A4 WO 2012162079A4 US 2012038293 W US2012038293 W US 2012038293W WO 2012162079 A4 WO2012162079 A4 WO 2012162079A4
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- WO
- WIPO (PCT)
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- pixel
- video frame
- pixel locations
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- locations
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
- G06F3/1462—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay with means for detecting differences between the image stored in the host and the images displayed on the remote displays
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/24—Keyboard-Video-Mouse [KVM] switch
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
An apparatus and method for lossless compression of digital video data being transmitted from a first electronic device to a second electronic device. Pixel locations of grids of first and second video frames are analyzed to determine which pixel locations of the second video frame have pixel values that have not changed from those in corresponding ones of the first video frame. Commands are sent identifying individual pixel locations in the second video frame that have pixel values that have not changed from those present in corresponding ones of the first video frame. The commands are used when updating the first video frame to match the second video frame. Additional commands identify those pixel locations in the second video frame that have pixel values that differ from corresponding ones of the pixel locations in the first video frame.
Claims
1. (Currently Amended) A method for compressing digital video data being transmitted from a first electronic device to a second electronic device, the method comprising:
analyzing a first video frame made up of a grid of rows and columns of pixel locations, where each said pixel location is defined by a row number and a column number, and each said pixel location includes a pixel value;
analyzing a second video frame made up of a grid of the same pixel locations as the first video frame, where certain ones of the pixel locations in the second video frame have pixel values that differ from the pixel values of corresponding said pixel locations in the first video frame;
transmitting a byte stream of compressed digital video data to said second electronic device from said first electronic device, said byte stream of compressed digital video data adapted to refresh the first video frame and including commands identifying:
which ones of said pixel locations in said second video frame have pixel values that are identical to pixel values in corresponding ones of said pixel locations in said first video frame, and when two or more contiguous ones of said pixel locations are identified that have the identical pixel values in said pixel locations of said first and second video frames, then providing a no change (NO pixel command that includes a number representing a string of contiguous pixel locations in a given row of said second video frame which have pixel values that match those in corresponding ones of said pixel locations of said first video frame; and
which specific ones of said pixel locations in said second video frame have pixel values that differ from pixel values present in corresponding ones of said pixel locations of said first video frame.
2. (Original) The method of claim 1 , wherein said commands to identify which specific ones of said pixel locations in said second video frame have pixel values that differ from corresponding ones of said pixel locations in said first video frame includes forming a copy left (CL) command that identifies horizontally contiguous ones of said pixel locations in said second video frame that include pixel values that match corresponding ones of said pixel locations in said first video frame.
3. (Original) The method of claim 1 , wherein said commands to identify which specific ones of said pixel locations in said second video frame have pixel values that differ from corresponding ones of said pixel locations in said first video frame includes forming a copy above (CA) command that identifies elevationally contiguous ones of said pixel locations in said second video frame that include pixel values that match corresponding ones of said pixel locations in said first video frame.
4. (Original) The method of claim 1 wherein said commands to identify which ones of said pixel locations in said second video frame have pixel values that differ from corresponding ones of said pixel locations in said first video frame include make pixel (MP) commands, and where each said MP command identifies a single specific one of said pixel locations in said second video frame that includes a pixel value that differs from a pixel value of its said corresponding pixel location said first video frame, and includes a pixel value present in said single specific one of said pixel locations.
5. (Currently Amended) A method for compressing digital video data being transmitted from a first electronic device to a second electronic device, the method comprising:
analyzing a first video frame made up of a plurality of pixel locations defined by rows and columns, where each said pixel location is defined by a row number and a column number, and each said pixel location includes a pixel value;
analyzing a second video frame made up of the same pixel locations as the first video frame, where certain ones of the pixel locations have pixel values that differ from the pixel values of corresponding said pixel locations in the first video frame;
identifying ones of said pixel locations in said second video frame that have pixel values that are identical to pixel values in corresponding ones of said pixel locations in said first video frame;
using a no change (NC) command to identify each one of said pixel locations where identical ones of said pixel values are present, and further using said NC command to include a number a number representing a string of contiguous ones of said pixel locations in a given one of said rows or spanning two or more contiguous ones of said rows, each said row of said second video frame where identical ones of said pixel values are present, with each said NC command representing a first byte size of data;
generating a make pixel (MP) command, for each said pixel location in said second video frame that has a pixel value that differs from said pixel value in said first video frame, each said MP command representing a second byte size of data greater than said first byte size of data;
transmitting said NC commands and said MP commands in a byte stream to said second electronic device; and
using said byte stream at said second electronic device to modify said first video frame to match said second video frame.
6. (Original) The method of claim 5, further comprising successively displaying said first video frame and said modified first video frame on a video display component.
7. (Original) The method of claim 5, further comprising:
generating a copy left (CL) command to designate one or more contiguous ones of said pixel locations in one or more rows of said second video frame that each include a pixel value that matches said pixel value in corresponding ones of said pixel locations of said first video frame; and
transmitting said CL command as part of said byte stream.
8. (Original) The method of claim 5, further comprising:
generating a copy above (CA) command to designate one or more contiguous ones of said pixel locations in a single one of said columns of said second video frame, which include pixel values that match pixel values in corresponding ones of said pixel locations of a corresponding column of said first video frame; and
transmitting said CA command as part of said byte stream.
9. (Original) The method of claim 5, wherein said NC command comprises one byte of data.
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10. (Original) The method of claim 5, wherein said NC command comprises one byte of data representing up to 31 ones of said pixel locations.
11. (Original) The method of claim 8, wherein said CA command comprises one byte of data representing up to 31 ones of said pixel locations.
12. (Original) The method of claim 7, wherein said CL command comprises one byte of data representing up to 31 ones of said pixel locations.
13. (Original) The method of claim 5, wherein said MP command comprises two bytes of data representing 1 pixel location.
14. (Original) The method of claim 5, wherein said NC command includes ones of said pixel locations that are present in two contiguous rows of said pixel locations.
15. (Currently Amended) A method for compressing digital video data being transmitted from a first electronic device to a second electronic device, the method comprising:
analyzing a first video frame made up of a plurality of pixel locations defined by rows and columns, where each said pixel location is defined by a row number and a column number, and each said pixel location includes a pixel value;
analyzing a second video frame made up of the same pixel locations as the first video frame, where certain ones of the pixel locations have pixel values that differ from the pixel values of corresponding said pixel locations in the first video frame;
identifying ones of said pixel locations that have identical ones of said pixel values in said first and second video frames;
using a no change (NC) command to identify individual ones of said pixel locations, as well as contiguous groups of pixel locations in one said row, in said second video frame that have pixel values that match pixel values in corresponding ones of said pixel locations of said first video frame, with each said NC command representing a first byte size of data and providing a number indicative of contiguous
26 pixel locations in the one said row that have ones of said pixel values that are the same in both of said first and second video frames;
generating a make pixel (MP) command, for each said pixel location in said second video frame that has a pixel value that differs from said pixel value in said corresponding pixel location of said first video frame, each said MP command representing a second byte size of data greater than said first byte size of data;
generating a command that designates that more than one contiguous ones of said pixel locations either in one or more rows of said second video frame, or in a single one of said columns of said pixel locations of said second video frame, have the same pixel values;
transmitting said NC command, said MP command and said CL command in a byte stream to said first electronic device; and
using said byte stream at said second electronic device to update said pixel values in said pixel locations of said first video frame to match all of said pixel values in said pixel locations of said second video second video frame.
16. (Original) The method of claim 15, wherein said generating a command comprises generating a copy left (CL) command, for a specific one of said pixel locations in said second video frame, that designates a total for how many ones of said pixel locations horizontally contiguous to said specific one of said pixel locations, are to have a pixel value that matches a pixel value in said pixel location immediately to a left of said specific one of said pixel locations.
17. (Original) The method of claim 15, wherein said generating a command comprises generating a copy above (CA) command, for a specific one of said pixel locations in said second video frame, that designates a total of how many ones of said pixel locations elevationally contiguous to said specific one of said pixel locations, are to have a pixel value that matches a pixel value in said specific one of said pixel locations.
27
18. (Currently Amended) A digital rack interface pod apparatus that interfaces a first electronic device to a second electronic device, the digital rack interface pod comprising:
an application specific integrated circuit (ASIC), the ASIC including: a processor;
a memory in communication with said processor;
a video compression engine;
a digital video compression algorithm used by said video compression engine, the algorithm adapted to perform a partial refresh operation to compress digital video data being transmitted from the digital rack interface pod to the second electronic device;
the video compression engine being configured to use the digital video compression algorithm to analyze sequential first and second digital video frames and identify groups of contiguous ones of said pixel locations in said second digital video frame that have pixel values that match corresponding ones of said pixel locations in said first digital video frame, and to generate no change (NC) commands which are transmitted as part of a digital byte stream to said second electronic device, and wherein each NC command provides a number that identifies a number of contiguous ones of said pixel locations in a given said row where said first and second digital video frames have identical pixel values, and which thus cause no change to ones of said pixel locations in said first digital video frame when said first digital video frame is refreshed to form said second digital video frame.
19. (Original) The apparatus of claim 18, wherein said video compression engine is further configured to use said digital video compression algorithm to identify pixel locations in said second digital video frame that have a pixel value which differs from corresponding ones of said pixel locations in said first digital video frame, and to generate make pixel (MP) commands, which are integrated into said digital byte stream, identifying new pixel values to be used for specific ones of said pixel locations in said first digital video frame when said first digital video frame is refreshed to form said second digital video frame.
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20. (Original) The apparatus of claim 18, wherein said video compression engine is further configured to use said digital video compression algorithm to identify pixel locations in said second digital video frame that have a common pixel value in contiguous pixel locations, and generating a copy command, which is integrated into said digital byte stream, identifying a specific pixel value that is to be copied into corresponding contiguous ones of said pixel locations in said first digital video frame when said first digital video frame is modified to form said second digital video frame.
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161488570P | 2011-05-20 | 2011-05-20 | |
| US61/488,570 | 2011-05-20 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2012162079A2 WO2012162079A2 (en) | 2012-11-29 |
| WO2012162079A3 WO2012162079A3 (en) | 2013-01-31 |
| WO2012162079A4 true WO2012162079A4 (en) | 2013-03-28 |
Family
ID=47217984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2012/038293 Ceased WO2012162079A2 (en) | 2011-05-20 | 2012-05-17 | Digital rack interface pod system and method incorporating lossless, partial video refresh feature |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2012162079A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10423556B2 (en) * | 2017-11-09 | 2019-09-24 | Vertiv It Systems, Inc. | KVM extension device self-contained within a video connector |
| CN113364888B (en) * | 2021-06-30 | 2022-05-31 | 重庆紫光华山智安科技有限公司 | Service scheduling method, system, electronic device and computer readable storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7006700B2 (en) * | 2004-06-25 | 2006-02-28 | Avocent Corporation | Digital video compression command priority |
| US8718147B2 (en) * | 2006-02-17 | 2014-05-06 | Avocent Huntsville Corporation | Video compression algorithm |
-
2012
- 2012-05-17 WO PCT/US2012/038293 patent/WO2012162079A2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012162079A2 (en) | 2012-11-29 |
| WO2012162079A3 (en) | 2013-01-31 |
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