| 摘要 |
A video encoder comprises a video frame receiver ( 101 ) connected to a processor ( 103 ) deriving relative frames from the received video frames and predicted frames. The processor is connected to a Discrete Fourier Transform (DCT) processor ( 105 ) which again is connected to a quantiser ( 107 ) for generating quantised spatial frequency coefficients for the relative frame. The output of the quantiser ( 107 ) is fed to a splitter that splits the data subset having low frequency components and a second data subset having frequency components. The first subset is used in the encoding loop comprising an inverse quantiser ( 111 ), inverse DCT processor ( 113 ), motion compensation processor ( 115, 117 ) and predicted frame processor ( 104 ). Hence, the encoding loop is simplified by only considering a reduced data set for each frame. A transmitter ( 119 ) transmits the video data as a progressively scalable stream for both the first and second data subsets. |
