Rate control encoding method and rate control encoding device using skip mode information

An encoding device comprising:

• a bit rate predictor that allocates all of a target number of bits with respect to a current window and a target number of bits of an intra frame;
• a processor that calculates a skip mode occurrence frequency with respect to frames inside a window previous to the current window, compares the calculated skip mode occurrence frequency with a reference value, and allocates an allocation number of bits with respect to the intra frame inside the current window that is higher than an initial target number of bits of the intra frame in the case that the calculated skip mode occurrence frequency exceeds the reference value;
• and
• an encoding rate controller that generates a quantization parameter with respect to each block of frames inside the current window according to the allocation number of bits allocated by the processor.

An encoding method executed by an encoding device, the method comprising:

• a) determining a skip mode occurrence frequency with respect to frames inside a window encoded previous to a current window;
• b) allocating, when the determined skip mode occurrence frequency exceeds a predetermined value, a number of bits for a frame inside the current window that greater than a predetermined number of bits;
• and
• c) encoding frames inside the current window using the allocated number of bits, when the determined skip mode occurrence frequency exceeds the predetermined value.