A multi-channel, area-efficient, audio sampling rate interpolator

The area and power consumption of sampled rate converter are governed largely by associated digital interpolation filters. This paper presents a novel multi-channel, area-efficient audio sampling rate interpolator, whose conversion ratio is 1:2 and 1:4. Several architectural and implementation features reduces the complexity of the filter and allow its realization in a die area of 0.032 mm² in 0.18 ¿m technology, meanwhile timing multiplexer scheme reduces clock frequency to minimum. Experiments show proposed methods could not only saved hardware resources but also reduce power consumption, so it is very suitable for consumer electronics.