Methods and Devices of Using a 26 MHz Clock to Encode Videos
First Claim
1. An encoding device capable of using a 26 MHz clock frequency to encode luminance and chrominance data of digital video data, the device comprising:
- an input clock operating at the 26 MHz clock frequency;
a re-sampling module to extend a first number of data per line to a second number of data per line, wherein the first number of data and the second number of data are the luminance and the chrominance data to be encoded;
a color subcarrier generator driven by the input clock to generate color subcarrier signals, the chrominance data from the re-sampling module are modulated by the color subcarrier signals, wherein modulated chrominance data are eventually combined with the luminance data from the re-sampling module; and
a digital to analog converter (DAC) to convert the modulated chrominance data which are eventually combined with the luminance data from the re-sampling module into analog signals.
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Abstract
The present invention provides a method and a device that use two different clock frequencies to encode video. The method and device would allow videos taken by an electronic device with input clock frequency at 26 MHz, to be encoded for playing back on TV. An exemplary method of using a 26 MHz clock to encode luminance and chrominance data of digital video data is provided. The method includes re-sampling the luminance and the chrominance data to extend a first number of data per line to a second number of data per line, and modulating the re-sampled chrominance data in the input clock domain by color subcarrier signals driven by an input clock. The method also includes combining the modulated re-sampled chrominance data and the re-sampled luminance data, and converting the combined modulated re-sampled chrominance data and re-sampled luminance data into analog signals. In one embodiment, the first number is 1652 and the second number is 1652 4/9.
42 Citations
22 Claims
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1. An encoding device capable of using a 26 MHz clock frequency to encode luminance and chrominance data of digital video data, the device comprising:
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an input clock operating at the 26 MHz clock frequency; a re-sampling module to extend a first number of data per line to a second number of data per line, wherein the first number of data and the second number of data are the luminance and the chrominance data to be encoded; a color subcarrier generator driven by the input clock to generate color subcarrier signals, the chrominance data from the re-sampling module are modulated by the color subcarrier signals, wherein modulated chrominance data are eventually combined with the luminance data from the re-sampling module; and a digital to analog converter (DAC) to convert the modulated chrominance data which are eventually combined with the luminance data from the re-sampling module into analog signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of using a 26 MHz clock to encode luminance and chrominance data of digital video data, the method comprising:
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re-sampling the luminance and the chrominance data to extend a first number of data per line to a second number of data per line; modulating the re-sampled chrominance data in the input clock domain by color subcarrier signals driven by an input clock; combining the modulated re-sampled chrominance data and the re-sampled luminance data; and converting the combined modulated re-sampled chrominance data and re-sampled luminance data into analog signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification