发明名称 |
Video signal transmission |
摘要 |
Video transmission comprising detecting whether the resolution of an input video is in a lower or higher resolution range 712; if the resolution is in a higher range, compressing video colour data of the input video by a constant compression ratio 730; if the resolution is in a lower range, applying no compression to video colour data of the input video 710; transmitting the resultant video frames at the same frame rate as the input video frame rate. The receiver of the transmitted video expands the video frames by a constant expansion ratio to restore the resolution to the original input video resolution when it detects that the video has been transmitted in a compressed format. Preferably the lower resolution range corresponds to a single link DVI or an HDMI with a low pixel clock frequency, and the higher range correspond to a dual link DVI or an HDMI with a high pixel clock frequency. Preferably the compression ratio is one half and compression involves chrominance sub-sampling 730. The transmission system may further comprise a KVM extender. The invention allows DVI or HDMI cable to transmit high definition video over long distances without the need for frame stores at the transmitter or receiver. |
申请公布号 |
GB2526773(A) |
申请公布日期 |
2015.12.09 |
申请号 |
GB20140006096 |
申请日期 |
2014.04.04 |
申请人 |
ADDER TECHNOLOGY LIMITED;NEXUS ELECTRONICS LIMITED |
发明人 |
NIGEL DICKENS;ANTHONY FIELD |
分类号 |
H04N19/136;H04N7/015;H04N7/10;H04N11/02;H04N19/132;H04N19/184;H04N19/186 |
主分类号 |
H04N19/136 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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