Patent ID: 8411745
Filing Date: 2013-04-02
Classification: H04N

Abstract:
1. An encoding apparatus using a bit precision, the apparatus comprising: a predicting unit, configured to determine a predicting method of each target pixel of a video datum to be encoded and to compute a prediction value of the target pixel by using the predicting method; an encoding unit connected to the predicting unit, the encoding unit configured to compute an error value by using the prediction value, to successively increase a size of a predetermined block at an increment of a predetermined unit from a predetermined size of the block and to select a first bit precision value according to the error value corresponding to the block to encode the error value; and a variable block forming unit connected to the encoding unit, the variable block forming unit configured to compute a variable block forming information indicating a forming of a block having an minimum compression capacity by using an encoded result of the block, wherein the encoding unit is configured to generate a bitstream by encoding a block according to the computed variable block forming information, wherein the encoding unit further computes a sign bit by using the prediction value, and at least one of the variable block information, the sign bit and the bit precision value is inserted into the bitstream, wherein the sign bit refers to a sign of a difference between a value of the target pixel and the prediction value, and wherein the prediction value is computed by using values of a plurality of pixels that are adjacent to the target pixel and the sign bit refers to a sign of a difference between a value of the target pixel and the prediction value.