초록 ▼

Systems and methods are provided for allocating bits to pictures in accordance with the bit allocation constraints for operation at both constant and variable bit rates. The encoding complexity of each picture is modeled based on its spatial and temporal properties. Based on the modeling, a number o

Systems and methods are provided for allocating bits to pictures in accordance with the bit allocation constraints for operation at both constant and variable bit rates. The encoding complexity of each picture is modeled based on its spatial and temporal properties. Based on the modeling, a number of bits is allocated in advance to each picture. Each picture is then compressed according to the bits allocated. Based on the difference between the achieved and desired bit rates and on the availability of computational resources, a second pass or multiple passes may be performed to improve the coding.

대표청구항 ▼

[ We claim:] [1.] A method for encoding of ordered coding units comprising the steps of:modeling coding distortions for each coding unit based on a number of bits assigned;assigning a number of bits to each coding unit in accordance with a set of rules such that the encoding distortion of each codin

[ We claim:] [1.] A method for encoding of ordered coding units comprising the steps of:modeling coding distortions for each coding unit based on a number of bits assigned;assigning a number of bits to each coding unit in accordance with a set of rules such that the encoding distortion of each coding unit except the first is lower than the encoding distortion of the previous coding unit only if fullness of a model decoder buffer would be below a first number after the removal of the previous coding unit from the decoder buffer; and the encoding distortion of each coding unit except the first is higher than the encoding distortion of the previous coding unit only if the decoder buffer fullness would be above a second number after the removal of the previous coding unit from the decoder buffer; and,encoding at least one of the coding units based on the assigning.