Patent ID: 7343286

Claim:
A apparatus for digital signal processing, provided for transforming a high-resolution digital signal into a low-resolution digital signal and sending the low-resolution digital signal to an electronic device in a time period, the digital signal processing apparatus comprising: a determination unit, generating instructions and a predetermined quantity according to bit quantities of the high-resolution digital signal and the low-resolution digital signal; a mask, dividing the high-resolution digital signal into the low-resolution digital signal and a remainder according to the instructions, wherein a value of the remainder is defined as B; an adder, receiving the low-resolution digital signal and adding one to a value of the low-resolution digital signal; and an output unit, receiving the predetermined number, the low-resolution digital signal, the value of one plus the low-resolution digital signal and the value B, dividing the time period into the predetermined quantity of time frames, sending a value of the low-resolution digital signal to the electronic device in the (2 (m−n) −B) time frames, and sending the value of one plus the low-resolution digital signal to the electronic device in the B time frames; wherein a result generated by the electronic device with the low-resolution digital signal is substantially equal to a result generated by the electronic device with the high-resolution digital signal.