Audio D/A converter, and DSD signal D/A conversion method
AssigneeRohm Co., Ltd.
InventorShinji Yamagami
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Abstract
An audio D/A converter for converting direct stream digital (DSD) data having a modulation rate m into an analog signal includes: an N-bit (N≥2) segment type D/A converter, a shift register configured to store M-bits (N≤MSN/m) of the DSD data; and a controller configured to supply an N-bit output code containing p 1s to the segment type D/A converter when the number of 1s stored in the shift register is p.
Claims14
An audio digital-to-analog (D/A) converter for converting direct stream digital (DSD) data having a modulation rate m into an analog signal, comprising:
- an N-bit (N≤2) segment type D/A converter;
- a shift register configured to store M-bits (N<M≤N/m) of the DSD data;
- and
- a controller configured to supply an N-bit output code containing p 1s to the segment type D/A converter when the number of 1s stored in the shift register is p.
An audio digital-to-analog (D/A) converter for converting direct stream digital (DSD) data having a modulation rate m into an analog signal, comprising:
- an N-bit (N≤2) segment type D/A converter;
- a shift register configured to hold N bits of the DSD data;
- and
- a controller configured to supply an N-bit output code containing α<n (where o is a constant satisfying (1<α≤1/m) 1s to the segment type D/A converter when the number of 1s contained in the shift register is n.
A method of converting direct stream digital (DSD) data having a modulation rate m into an analog signal, comprising:
- counting a number p of 1s contained in M consecutive bits (N<M≤N/m) of the DSD data;
- generating an N-bit output code containing p 1s;
- and
- converting the N-bit output code into the analog signal by an N-bit segment type D/A converter.
Dependencies are inferred from the claim text.