Patent ID: 9661333
Date: 2017-05-23
CPC Classifications: H04N

Claim:
1. An image processor comprising: circuitry configured to: perform encoding including quantization on an image signal; and control a quantization parameter for the quantization, wherein the circuitry is further configured to determine a quantization parameter of a currently targeted macroblock for performing the encoding by either increasing or decreasing a value from a reference value; and determine a target amount of code for a plurality of macroblocks fewer than a total number of macroblocks within one frame, wherein the circuitry is further configured to determine the value based on a difference between the target amount of code and a generated amount of code of macroblocks traced back at least one macroblock line from the currently targeted macroblock, the encoding having been performed on the macroblocks traced back at least one macroblock line from the currently targeted macroblock, wherein the circuitry is further configured to determine the reference value by calculating an average of quantization parameters of the macroblocks traced back one macroblock line from the currently targeted macroblock, and wherein the circuitry is further configured to perform the encoding on the image signal using the determined quantization parameter.