Method and apparatus for representation of video and audio signals on a low-resolution display
First Claim
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1. A method for modulation of a video signal for display on a low-resolution display, the method comprising:
- scaling the video signal to fit the low-resolution display;
quantizing the video signal to predetermined level values;
generating a pulse density modulated representation of the scaled and quantized video signal;
altering the scaled and quantized video signal to result in an increased temporal distance between each two consecutive pulses in the pulse density modulated representation to decrease flickering; and
sending the pulse density modulated representation of the scaled and quantized video signal directly to a display buffer for output of the pulse density modulated representation of the scaled and quantized video signal to the low-resolution display.
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Abstract
The method for the representation of video and audio signals on a low-resolution display panel, which includes the steps of: scaling the video or audio frame to fit the display panel, quantization of the video or audio signals to predetermined level values, temporal representation of video data by using the pulse density modulation, sending the signal pulses to the display panel. In further aspect the step of temporal representation contains the anti-flickering signal manipulation technique incorporating maximization of separation of the pulses during the pulse density modulation.
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Citations
16 Claims
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1. A method for modulation of a video signal for display on a low-resolution display, the method comprising:
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scaling the video signal to fit the low-resolution display; quantizing the video signal to predetermined level values; generating a pulse density modulated representation of the scaled and quantized video signal; altering the scaled and quantized video signal to result in an increased temporal distance between each two consecutive pulses in the pulse density modulated representation to decrease flickering; and sending the pulse density modulated representation of the scaled and quantized video signal directly to a display buffer for output of the pulse density modulated representation of the scaled and quantized video signal to the low-resolution display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A video signal modulator comprising:
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a video processor configured to; scale a video signal to fit a low-resolution display to generate a scale video signal; and quantize the scaled video signal to decrease the number of bits representing digital values of the scaled video signal to generate a scaled and quantized video signal; and a pulse density modulator configured to modulate the scaled and quantized video signal to generate a pulse density modulated video signal representation of the scaled and quantized video signal having an increased separation between consecutive pulses in the pulse density modulatedvideo signal to mitigate flickering; an audieo signal transformer configured to transform and output a transformed audio data signal to the low-resolution display. - View Dependent Claims (12, 13)
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14. A video and audio signal reproducer, the reproducer comprising:
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a video signal modulator configured to scale a video signal to fit a low-resolution display, quantize the video signal to predetermined level values and generate a pulse density modulated representation of the scaled and quantized video signal having an increased temporal distance between each two consecutive pulses in the pulse density modulated representation to mitigate flickering; an audio signal transformer configured to transform a the decimated and quantized audio data signal into a logarithmic scale and generate a transformed audio signal; a display buffer configured to; receive and store the pulse density modulated video signal and the transformed audio signal; and output the pulse density modulated video signal representation and the transformed audio signal to the low-resolution display. - View Dependent Claims (15, 16)
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Specification