×

Method and apparatus for selectible quantization in an encoder

  • US 7,058,677 B1
  • Filed: 07/17/2001
  • Issued: 06/06/2006
  • Est. Priority Date: 07/17/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for selectable quantization, the method comprises:

  • performing a discrete cosine transform function upon a macroblock of Motion Picture Expert Group (MPEG) encoded data of an encoded signal to produce discrete cosine transform data, wherein the discrete cosine transform data includes a matrix of data values;

    receiving discrete the cosine transform data of the encoded signal;

    obtaining a quantization table;

    obtaining a plurality of quantization scaling factors;

    generating a plurality of quantized value sets of the discrete cosine transform data based on the quantization table and plurality of quantization scaling factors;

    determining quantization selection criteria based on complexity of the matrix of data values, wherein greater complexity of the matrix of data values results in a lower level of desired quantization and wherein lesser complexity of the matrix of data values results in a higher level of desire quantization; and

    selecting one of the plurality of quantized value sets based on the quantization selection criteria to produce quantized data.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×