Texas Instruments Corporation

Nengtan Lin

Kashipati G Rao

A method for generating image compression quantization matrices is disclosed. A method includes a step of locating a frequency coefficient ( ) within a transform array ( ). A method also includes a step determining a frequency content ( ) for the frequency coefficient ( ). Method also includes the step of determining the orientation content for the frequency coefficient ( ). The method also includes the step of selecting a quantization matrix ( ) correlating to the frequency content ( ) and the orientation content. The method also includes the step of quantizing the transform array ( ) with the quantization matrix ( ).

Image compression system and method

A system ( ) for generating image compression matrices is disclosed. The present invention includes an image ( ) having pixel block arrays ( ). The present invention also includes a transformer ( ) that performs discrete cosine transforms on the pixel block arrays ( ) to generate a discrete cosine transform array ( ). The present invention also includes a quantizer ( ) that receives the discrete cosine transform array ( ) and retrieves a quantization coefficient matrix ( ) and a model metric ( ). Quantizer ( ) partitions the quantization coefficient matrix ( ) with the model metric ( ) to generate a quantization matrix ( ). Quantizer ( ) also quantizes discrete cosine transform array ( ) with the quantization matrix ( ) to create a quantized array ( ). The present invention also includes an encoder ( ) that compresses the quantized array ( ).

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Dallas, TX, United States of America

Nengtan Lin