System and method for low-latency processing of intra-frame video pixel block prediction

A method for low-latency processing of intra-frame video pixel block prediction, the method comprising:

• electronically predicting a pixel block based on boundary pixels of left and upper neighbor blocks of said pixel block;
• electronically pre-computing a block of source DC-coefficients used with luma and chroma intra and inter prediction modes, based on said pixel block;
• electronically predicting a block of predicted DC-coefficients, based on a reconstructed pixel block;
• electronically subtracting said predicted DC-coefficients from said source DC-coefficients to generate DC-coefficients of a prediction error;
• electronically forward transforming and quantizing said prediction error to generate a residual data;
• electronically inverse transforming and quantizing said residual data;
• electronically adding said predicted pixel block to said inverse transformed and quantized residual data to generate said reconstructed pixel block;
• electronically pre-computing mode selection of a best prediction mode of said luma and chroma intra and inter prediction modes, before said reconstructed block is generated;
• and
• electronically outputting said residual data to be used in entropy or arithmetic coding, and a reconstructed data used for motion prediction.

A method for low-latency processing of a block of DC coefficients of a video pixel block in an intra-frame video pixel block prediction, the method comprising:

• electronically predicting a DC-block based on boundary pixels of left and upper neighbor blocks of said pixel block;
• electronically pre-computing a block of source DC coefficients for a pixel block and said predicted pixel block to be used with a plurality of prediction modes;
• electronically predicting a block of predicted DC-coefficients, based on a reconstructed pixel block;
• electronically subtracting said source DC-block from said predicted DC-block to obtain a prediction error for said DC-block;
• electronically transforming and quantizing said prediction error to generate a residual data, wherein said pre-computing a DC-block is performed before said subtraction and transformation;
• electronically inverse transforming and quantizing said residual data;
• electronically adding said predicted DC-block to said inverse transformed and quantized residual data to generate a reconstructed block;
• and
• electronically outputting said residual data and said reconstructed block.