Patent ID: 7256838

Claim:
A video signal processing method which is provided for a digital video decoder for decoding continuous digital composite video signals in order to suppress a fluctuation of a number of sampling data constructing each of said digital composite video signals to be processed by said decoder, said method comprising: counting the numbers of sampling data in each of said digital composite video signals to provide respective count values; comparing the count values of each of said digital composite video signals with a reference number of sampling data of each of said digital composite video signals; discriminating whether the number of sampling data of said digital composite video signals should be increased or decreased based on a difference obtained as a result of said comparison, and when said difference lies within a predetermined adjusting range, outputting an operation signal for increasing or decreasing the number of sampling data; and executing a partial adding/deleting process to each of said digital composite video signals to correct the fluctuation of the number of sampling data of each of said digital composite video signals, responsive to the operation signal, wherein said discriminating comprises accumulating a difference between each of said count values and said reference number of sampling data, and outputting said operation signal when a result of said accumulation lies within said predetermined adjusting range, and wherein a predetermined number of digital composite video signals correspond to a scanning field which is specified between said digital composite video signals each having a vertical sync signal, and said predetermined adjusting range is given with respect to said accumulation of the differences with regard to a plurality of digital composite video signals in said scanning field.