Apparatuses and methods for adjusting coefficients using dead zones
First Claim
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1. An encoder, comprising:
- a transform configured to transform a portion of a video signal into a plurality of coefficients;
a coefficient adjustment block configured to set to zero certain coefficients of the plurality of coefficients based on a comparison with a threshold, wherein a number of bits available to encode the portion of the video signal is based at least in part on a number of the certain coefficients that are set to zero; and
a quantization block configured to receive adjusted coefficients from the coefficient adjustment block and quantize the coefficients.
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Abstract
Apparatuses and methods for adjusting coefficients for use in video encoding are described. An example apparatus may include an encoder that may be configured to receive transform coefficients and adjust selected ones of the transform coefficients (e.g. reset the selected ones to zero) based on a comparison with a threshold. The adjusted coefficients may then be quantized, which may result in effectively increasing a QP range of the encoder.
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Citations
18 Claims
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1. An encoder, comprising:
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a transform configured to transform a portion of a video signal into a plurality of coefficients; a coefficient adjustment block configured to set to zero certain coefficients of the plurality of coefficients based on a comparison with a threshold, wherein a number of bits available to encode the portion of the video signal is based at least in part on a number of the certain coefficients that are set to zero; and a quantization block configured to receive adjusted coefficients from the coefficient adjustment block and quantize the coefficients. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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receiving a video signal; transforming at least a portion of the video signal to generate a plurality of coefficients; setting to zero certain coefficients of the plurality of coefficients based on a comparison with a threshold; quantizing the adjusted coefficients; and encoding the portion of the video signal, wherein a number of bits available to encode the portion of the video signal is based at least in part on a number of the certain coefficients that are set to zero. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification