Generation of a frame synchronized clock for a wireless video receiver
First Claim
1. A wireless video receiver to receive a wireless video transmission including data representing pixels of a video frame and a synchronization signal indicative of a beginning of said video frame, said wireless receiver comprising:
- a clock generator to generate a pixel clock signal synchronized to said synchronization signal, wherein a clock rate of said pixel clock signal corresponds to a pixel rate of said pixels, said clock generator comprising;
a first clock generation module to generate an intermediate clock signal synchronized to said synchronization signal, wherein an intermediate clock rate of said intermediate clock signal is lower than said pixel rate; and
a second clock generation module to generate said pixel clock signal based on said intermediate clock signal.
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Accused Products
Abstract
An apparatus for receiving essentially uncompressed HDTV video must generate an accurate pixel-rate clock to enable the reconstruction of a video frame. The clock pixel-rate generated must match a received video pixel-rate. In such system, signals for generation of horizontal and vertical synchronization are not transmitted over the wireless link to conserve the use of bandwidth. In the invention, a start of frame (SOF) indication is extracted by a symbol detection and synchronization (SDS) module and is used to generate the pixel-rate clock.
26 Citations
16 Claims
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1. A wireless video receiver to receive a wireless video transmission including data representing pixels of a video frame and a synchronization signal indicative of a beginning of said video frame, said wireless receiver comprising:
a clock generator to generate a pixel clock signal synchronized to said synchronization signal, wherein a clock rate of said pixel clock signal corresponds to a pixel rate of said pixels, said clock generator comprising; a first clock generation module to generate an intermediate clock signal synchronized to said synchronization signal, wherein an intermediate clock rate of said intermediate clock signal is lower than said pixel rate; and a second clock generation module to generate said pixel clock signal based on said intermediate clock signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless video communication system comprising:
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a wireless video transmitter to transmit a wireless video transmission including data representing pixels of a video frame and a synchronization signal indicative of a beginning of said video frame; and a wireless video receiver to receive said wireless video transmission, said receiver comprising a clock generator to generate a pixel clock signal synchronized to said synchronization signal, wherein a clock rate of said pixel clock signal corresponds to a pixel rate of said pixels, wherein said clock generator comprises; a first clock generation module to generate an intermediate clock signal synchronized to said synchronization signal, wherein an intermediate clock rate of said intermediate clock signal is lower than said pixel rate; and a second clock generation module to generate said pixel clock signal based on said intermediate clock signal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of wireless video communication, the method comprising:
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receiving a wireless video transmission including data representing pixels of a video frame and a synchronization signal indicative of a beginning of said video frame; and generating a pixel clock signal synchronized to said synchronization signal, wherein a clock rate of said pixel clock signal corresponds to a pixel rate of said pixels, wherein generating said pixel clock comprises; generating an intermediate clock signal synchronized to said synchronization signal, wherein an intermediate clock rate of said intermediate clock signal is lower than said pixel rate; and generating said pixel clock signal based on said intermediate clock signal. - View Dependent Claims (15, 16)
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Specification