Invention Grant
- Patent Title: Method and apparatus for efficient conversion of signals using look-up table
- Patent Title (中): 使用查找表有效地转换信号的方法和装置
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Application No.: US10795914Application Date: 2004-03-08
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Publication No.: US06982662B2Publication Date: 2006-01-03
- Inventor: Jaehoon Heo
- Applicant: Jaehoon Heo
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Robert D. Marshall, Jr.; W. James Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H03M7/00
- IPC: H03M7/00

Abstract:
An apparatus and method for conversion of direct stream digital (DSD) signal samples to pulse code modulated (PCM) signal samples using a look-up table. The apparatus includes a first-in-first-out (FIFO) buffer that contains a plurality of bits from a DSD signal, the plurality of bits further divided into a plurality of words of the same size. The apparatus comprises a look-up table coupled to the FIFO buffer, the look-up table generating a result for each of the plurality of words. In one embodiment, the apparatus includes an accumulator coupled to the look-up table, the accumulator holding the results added together. After adding the result for the last word in the plurality of bits, the accumulator generates at an output a multiple bit PCM signal sample. The apparatus includes an address generator connected to the FIFO buffer and look-up table.
Public/Granted literature
- US20040174279A1 Method and apparatus for efficient conversion of signals using look-up table Public/Granted day:2004-09-09
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