Advanced method for rate control and apparatus thereof

A rate control method comprising:

• setting initial values for rate control and encoding;
• calculating a target encoding bit value based on the set initial values;
• performing rate control and encoding of a current bit stream based on the calculated target encoding bit value;
• measuring the picture quality of the current encoded bit stream, determining whether or not to skip the current encoded bit stream by comparing the measured picture quality with a reference picture quality, and generating a current encoded bit stream skip control signal;
• and
• controlling skipping of the current encoded bit stream based on the current bit stream skip control signal,
• wherein the reference picture quality is determined by the picture quality of frames in a sliding window formed by a predetermined number of frames preceding the current frame.

A computer readable medium in a rate control apparatus, the computer readable medium having embodied thereon a computer program when executable by a computer for providing a method comprising:

• setting initial values for rate control and encoding;
• calculating a target encoding bit value based on the set initial values;
• performing rate control and encoding of a current bit stream based on the calculated target encoding bit value;
• measuring the picture quality of the current encoded bit stream, determining whether or not to skip the current encoded bit stream by comparing the measured picture quality with a reference picture quality, and generating a current encoded bit stream skip control signal;
• and
• controlling skipping of the current encoded bit stream based on the current bit stream skip control signal,
• wherein the reference picture quality is determined by the picture quality of frames in a sliding window formed by a predetermined number of frames preceding the current frame.

A rate control apparatus comprising:

• an initial value setting unit which sets initial values for rate control and encoding;
• a target bit value calculating unit which calculates a target encoding bit value based on the set initial values;
• a rate control and encoding unit which performs bit rate control and encoding of a current bit stream based on the calculated target encoding bit value;
• a picture quality measuring unit which measures the picture quality of the current encoded bit stream;
• and
• a bit rate control information generating unit which compares the measured picture quality with the scope of a predetermined reference picture quality to determine whether or not the measured picture quality is within the scope, and if the measured picture quality exceeds the scope of the predetermined reference picture quality, generates bit rate control information for rate control and sends the information to the rate control and encoding unit,
• wherein the scope of a predetermined reference picture quality is determined by the picture quality of frames in a sliding window formed by a predetermined number of frames preceding the current frame.

A rate control method comprising:

• setting initial values for rate control and encoding;
• calculating a target encoding bit value based on the set initial values;
• performing rate control and encoding of a current bit stream based on the calculated target encoding bit value;
• measuring the picture quality of the current encoded bit stream;
• and
• comparing the measured picture quality with the scope of a predetermined reference picture quality to determine whether or not the measured picture quality is within the scope, and if the measured picture quality exceeds the scope of the predetermined reference picture quality, updating a bit rate control information for rate control,
• wherein the scope of a predetermined reference picture quality is determined by the picture quality of frames in a sliding window formed by a predetermined number of frames preceding the current frame.

A computer readable medium in a rate control apparatus, the computer readable medium having embodied thereon a computer program when executable by a computer for providing a method comprising:

• setting initial values for rate control and encoding;
• calculating a target encoding bit value based on the set initial values;
• performing rate control and encoding of a current bit stream based on the calculated target encoding bit value;
• measuring the picture quality of the current encoded bit stream;
• and
• comparing the measured picture quality with the scope of a predetermined reference picture quality to determined whether or not the measured picture quality is within the scope, and if the measured picture quality exceeds the scope of the predetermined reference picture quality, updating a bit rate control information for rate control,
• wherein the scope of a predetermined reference picture quality is determined by the picture quality of frames in a sliding window formed by a predetermined number of frames preceding the current frame.