2 results about "Prototype filter" patented technology

A decoding method and an encoding method applying filter coefficient update are provided. The decoding method includes: determining a plurality of reference samples for a prediction mode; determining a prototype filter; acquiring an updated filter based on the prototype filter by trimming and / or truncating one or more coefficients of the prototype filter; and filtering the plurality of reference samples with the updated filter to generate predicted samples of a current block.

The invention discloses a sound field control method, a measurement device, electronic equipment and a readable storage medium, and relates to the technical field of spatial audio, and the method comprises the steps: obtaining the propagation time delay from a plurality of sound sources to at least one target listening point in a target listening area; performing pulse response modeling based on each propagation time delay to obtain a prototype filter model; performing optimization solution on the prototype filter model according to a preset target response function to obtain a target filter coefficient; wherein the objective of the optimization solution is to minimize an error between a system response function of the prototype filter model after the prototype filter model is processed by a target filter coefficient and a target response function; the target filter coefficient is used for filtering the audio input signal so as to reconstruct or form a sound field in the target listening area. According to the invention, the robustness of sound field control is improved.