Patent ID: 6549672
Filing Date: 2003-04-15
Classification: H04N

Abstract:
A method for encoding data comprising determining a central value for a range of values by selecting a value that is greater than a minimum value of a range of data and less than a maximum value of the range of data and substantially reduces a decoding error in the event that the range of values is subsequently estimated and wherein said encoding is performed on said data using Adaptive Dynamic Range Coding (ADRC), and encoded data includes a quantization code (Qcode) defined according to an equation selected from the group consisting of: qi=&LeftFloor;(2Q-1)&it;â€ƒ&it;(xi-CEN)DR+1&it;/&it;2&RightFloor;;â€ƒ&it;andqi=&LeftFloor;2Q&it;(xi-CEN+1&it;/&it;2)DR&RightFloor;where qi represents a Qcode, Q represents a number of quantization bits, xi represents the unencoded data, DR represents a dynamic range of data and CEN represents a central value.