Abstract: An embedded decoder circuitry for bias minimization in successively reconstructed images from a decoded image obtained from an encoded input image, includes an on-chip memory and a bias control circuit communicatively coupled to the on-chip memory. The on-chip memory stores transform-domain compressed data that includes a plurality of transform blocks of an input image. The bias control circuit is configured to determine a set of conditions associated with each transform coefficient in a transform block of the encoded input image and modify a set of transform coefficients from the plurality of transform coefficients in the transform block based on determination of the set of conditions. The bias control circuit is further configured to generate a decoded image that exhibits a reduced error propagation in successively reconstructed images with respect to the input image, based on inverse transformation of each transform block of the encoded input image.

Abstract: An image-processing apparatus and method for variable length coding of header data for image compression, includes retrieval of an input image stored in a first storage space in a memory. The input image is partitioned into a plurality of blocks. A header section is generated comprising a sequence of header bits having a first number of bits for a first block of the plurality of blocks based on application of a sequential encoding scheme on the first block. The header section in which the sequence of header bits may indicate a coding type, a transform type, a prediction type, and a QP value selected in the sequential encoding scheme, is encoded. The selected QP value may be encoded by variable length coding to reduce the first number of bits to a second number of bits in the encoded header section.

Abstract: To reduce the complexity of rate-distortion cost computation in AVC (MPEG4 Part2/H.264), a bit rate estimation method is used to avoid entropy coding during Intra and Inter mode decision. The bit rate estimation method predicts the number of entropy coded bits based on the quantized transform coefficients, thus avoiding the need to entropy code the quantized transform coefficients at each decision iteration.

Abstract: To reduce the complexity of rate-distortion cost computation in AVC (MPEG4 Pat2/H.264), a bit rate estimation method is used to avoid entropy coding during Intra and Inter mode decision. The bit rate estimation method predicts the number of entropy coded bits based on the quantized transform coefficients, thus avoiding the need to entropy code the quantized transform coefficients at each decision iteration.