Methods and apparatus for processing video data

A method for decoding video data encoded using one or more variable length codes (VLCs), the method comprising:

• storing in a computer readable storage a plurality of absolute values of decoded video data values for either intra-pictures or inter-pictures but not for both the intra- and inter-pictures, wherein the decoded values for the intra-pictures are an inversion of the decoded values for the inter-pictures;
• receiving VLCs which include a bit defining a sign of a decoded value corresponding to the VLC;
• obtaining an absolute value of the decoded value corresponding to the VLC from the computer readable storage containing absolute values of decoded video data values, wherein if the decoded values for the intra-pictures are stored then the decoded values for the inter-pictures are obtained from the decoded values for the intra-pictures, and if the decoded values for the inter-pictures are stored, then the decoded values for the intra-pictures are obtained from the decoded values for the inter-pictures;
• determining the sign of the decoded value from the bit of the VLC;
• and
• combining the absolute value with the sign determined from the VLC to provide the decoded value.

A method for decoding video data encoded using one or more variable length codes (VLCs), the method comprising:

• storing in a computer readable storage a plurality of decoded video data storing, in a computer readable storage, all the bits of a plurality of decoded video data values except the least significant bits (LSBs) of the decoded values wherein the plurality of decoded video data values being stored are for either intra-pictures or inter-pictures but not for both the intra- and inter-pictures, wherein the decoded values for the intra-pictures are an inversion of the decoded values for the inter-pictures;
• receiving a VLC which includes a bit defining whether a decoded video data value corresponding to the VLC is odd or even;
• obtaining each bit of the decoded value corresponding to the VLC except the LSB of the decoded value from the computer readable storage, wherein if the storage stores the decoded values for the intra-pictures, then the decoded values for the inter-pictures are obtained from the decoded values for the intra-pictures, and if the storage stores the decoded values for the inter-pictures then the decoded values for the intra-pictures are obtained from the decoded values for the inter-pictures;
• determining the LSB of the decoded value from the bit of the VLC;
• and
• combining said each bit of the decoded value except the LSB of the decoded value with the LSB determined from the VLC to provide the decoded value.

A method for decoding video data encoded using one or more variable length codes (VLCs), the method comprising:

• storing in a computer readable storage a plurality of decoded video data values for either intra-pictures or inter-pictures but not for both the intra- and inter-pictures, wherein the decoded values for the intra-pictures are an inversion of the decoded values for the inter-pictures;
• receiving VLCs;
• and
• obtaining decoded values corresponding to the VLCs from a computer readable storage, wherein if the storage stores the decoded values for the intra-pictures, then the decoded values for the inter-pictures are obtained from the decoded values for the intra-pictures, and if the storage stores the decoded values for the inter-pictures, then the decoded values for the intra-pictures are obtained from the decoded values for the inter-pictures.