| 摘要 |
In an arrangement for coding multi-element signals such as used in speech or image processing, a plurality of N element reference signals representable in a prescribed vector space are stored (101). An N element input signal representable in the prescribed vector space is received (103) and one of the reference signals is selected to represent the input signal. A set of signals each representative of the projection of one of the reference signals on a predetermined orientation in the prescribed vector space and a signal representative of the projection of the input signal on the predetermined orientation are formed. The reference signals are arranged according to their projections on the predetermined orientation. Candidates for the best matching reference signal are selected (135,140) according to the differences between their projections on the prescribed orientation and the projection of the input signal on the prescribed orientation an projection difference signals are utilized to determine the reference signal closest to the input signal in the prescribed vector space. |
