Patent ID: 9167345
Filing Date: 2015-10-20
Classification: H04R

Abstract:
1. A method of channel equalization and beam controlling for a digital speaker array system, comprises steps of: (1) converting digital format, to convert original signals into digital signals based on PCM coding; (2) channel equalization processing; (3) controlling beam-forming; (4) performing multi-bit Σ-Δ modulation; (5) thermometer code conversion, to convert low-bit PCM coded signals with a bit-width of M into unary code vectors of a digital power amplifier and a transducer load corresponding to 2 (6) dynamic mismatch-shaping processing, to reorder the thermometer coded vectors; and (7) extracting channel information, to send to the digital power amplifier and drive load sound, wherein the beam-forming in step (3) is controlled by a beam-former with a channel weight coefficient calculated by a regular method for beam-forming utilizing the following formula (1): wherein, a(θ) represents the spatial domain steering vector and a(θ)=[a 1 (θ) a 2 (θ) . . . a N (θ)] T , N represents the elements number of array, and D(θ) represents the desired spatial domain beam configuration and