Patent ID: 7720158

Claim:
A memory managing method for a video decoding process, comprising: A. storing a first frame having a first definition in an unused memory space of a memory, wherein the first frame is either a first type or a second type; B. sequentially storing the X th row data of a second frame having the first definition in the unused memory space of the memory, wherein the second frame is either the first type or the second type; C. storing the Y th row data of the first frame having a second definition in the unused memory space of the memory, wherein the memory size for storing the first definition is greater than the memory size for storing the second definition; D. sequentially releasing the memory space where the Y th row data of the first frame having the first definition was originally stored, wherein (X−Y) is greater than a predetermined tolerance value; and E. storing a third frame having the second definition in the unused memory space of the memory, wherein the third frame is a third type.