| 摘要 |
PURPOSE: A system and a method for object-oriented video encoding are provided to flexibly change the size of an image by orienting to a moving object and using wavelet transformation, to enhance speed gain and compressing efficiency by supporting multiple resolution and increasing processing speed, and to reduce the size and capacity of a memory by enhancing the compressing efficiency. CONSTITUTION: An object-oriented video encoding system comprises a subtracter(10), an object sampling unit(12) sampling the moving objects included in a following picture and calculating the motion vector of the moving object, a discrete wavelet transformation unit(16) wavelet-transforming a reference picture, wavelet-transforming the difference image between a prior picture and the following picture, and outputting a wavelet transformation value, a quantization unit(18) outputting a quantized value by quantizing the wavelet transformation value, an entropy coder(20) outputting an encoded value by arithmetically coding the quantized value, a multiplexer/buffer(22) temporarily storing the encoded value and motion vector and forming a bit stream including the encoded value and motion vector, an inverse quantization unit(24), an invert discrete wavelet transformation unit(26), an adder(28), and a frame memory(30). The video encoding system encodes the plural pictured including a reference picture and at least one of following pictures arranged after the reference picture. Even the minute motion of the object in a picture is identified. |
