Generalized data processing path for performing transformation and quantization functions for video encoder systems

Claim 1

A generalized data path for performing calculations for an encoder system, comprising: a memory for storing data values, an adder and subtractor coupled to said memory for performing preliminary butterfly calculations; first select logic for selecting data values between said memory and said adder and subtractor; a plurality of multiplier and accumulator units (MACs) coupled to said first select logic for performing arithmatic and accumulation functions on data values selected by said first select logic, wherein each of said plurality of MACS includes: a binary multiplier; a shifter coupled to said multiplier; an adder/subtractor coupled to said shifter; feedback select logic coupled to said adder/subtractor; and an accumulation register coupled to said adder/subtractor and said feedback select logic; wherein said feedback select logic is configurable to output the value in said accumulation register to said adder/subtractor; a plurality of adders and subtractors coupled to said memory for performing butterfly calculations on data values from said plurality of MACs; second select logic coupled to said plurality of MACs and said memory for providing data values to said memory and said plurality of adders and subtractors; and control logic coupled to said memory, said first and second select logic and to said plurality of MACs for controlling data flow and for determining the type of operation performed.