QUALCOMM Incorporated
Predictive coefficient coding

Abstract:

A video decoder configured to determine a residual block by, for a first coefficient of a coefficient group, receiving a first instance of a flag, wherein the first instance of the flag is set to a first value; in response to the first instance of the flag being set to the first value, copying a coefficient value of a neighboring coefficient for the first coefficient; for a second coefficient of the coefficient group, receiving a second instance of the flag, wherein the second instance of the flag is set to a second value; in response to the second instance of the flag being set to the second value, receiving an index; determining, from a list of coefficient values, a value corresponding to the index; and set a value for the second coefficient to the value corresponding to the index.