초록 ▼

An apparatus and method for communicating image sequences through a bandwidth limited channel have circuitry for estimating, for successive images of the sequence, a motion vector field. The motion vector field measures the motion displacement between successive images of the sequence for block regi

An apparatus and method for communicating image sequences through a bandwidth limited channel have circuitry for estimating, for successive images of the sequence, a motion vector field. The motion vector field measures the motion displacement between successive images of the sequence for block regions of the image. A lossy coding circuitry represents the sequentially generated motion vector field for an image as a coded motion signal. An error reconstruction circuitry generates an error signal in response to the vector field coded motion signal and a channel encoder transmits the motion vector field coded signals and the error coded signals over the channel to a receiver. At the receiver, the transmitted error and motion coded signals are received and decoded, and a received image is derived therefrom. The lossy coding circuitry can be any of a number of different circuitries, and in particular, block transform coding can be employed. The transformed coding methods and apparatus are selected to avoid artifacts in the motion vector field and coding process such as blocking effects.

대표청구항 ▼

An image sequence transmission apparatus for transmitting a sequence of images over a channel comprising means for estimating, for successive images of the sequence, a measure of the motion displacement between said successive images, lossy coding means for representing said sequentially generated m

An image sequence transmission apparatus for transmitting a sequence of images over a channel comprising means for estimating, for successive images of the sequence, a measure of the motion displacement between said successive images, lossy coding means for representing said sequentially generated measures for an image as a coded motion signal representation, means for generating, using said coded motion signal representation, an error reconstruction signal, and means for transmitting over said channel said coded motion signal representation and said error reconstruction signal.