Mediatek Corporation

Mediatek Incorporation

Meiyin Shen

Chung-Chieh Kuo

Do-Kyoung Kwon

Do Kyoung Kwon

A video encoder controlling rate of each frame in a current frame set (Group of Picture, GOP), and method thereof. The video encoder comprises a frame grouping device, a GOP initialization device, and a GOP encoding device. The frame grouping device allocates a target bit budget Rto the current frame set. The GOP initialization device is coupled to the frame grouping device, and estimates a first quantization parameter QPbased on the target bit budget Rand complexity of the current frame set. The GOP encoding device is coupled to the GOP initialization device, and encoding a frame in the current frame set with the second quantization parameter QPto generate output data.

Rate control method with frame-layer bit allocation and video encoder

A method of rate control in a video encoder includes performing a first encoding step to encode macroblocks of a current frame by utilizing a first quantization parameter to thereby generate a residual signal for the current frame; estimating a number of header bits for each macroblock mode to thereby estimate a total number of header bits for the current frame; estimating an available number of texture bits according to the total number of header bits for the current frame; determining a second quantization parameter according to the estimated available number of texture bits; and performing a second encoding step to encode the residual signal for the current frame by utilizing the second quantization parameter.

Growing community of inventors

Kaonsiung, Taiwan

Meiyin Shen