System and methods for memory-constrained sound synthesis...

Details System and methods for memory-constrained sound synthesis... System and methods for memory-constrained sound synthesis...

2007-05-01

2007-05-01

Fletcher, Marlon (Department: 2837)

Music

Instruments

Electrical musical tone generation

C084S603000, C084S604000, C084S608000, C084S623000

Reexamination Certificate

active

10964385

ABSTRACT:
Systems (100or300) and methods (400or500) are provided for selecting a post-compression waveform from a post-compression waveform table (106) and supplying it to a synthesis engine (108). The post-compression waveform is based upon a set of post-compression coefficients determined by generating a frequency-domain representation of a periodic signal, the representation including at least one pre-compression frequency-domain sample (204), and performing a threshold-based compression of the pre-compression frequency-domain samples. Systems and methods also include indexing and storing (502) post-compression coefficients in a post-compression coefficient table (102), generating (506) a post-compression waveform based upon the set of post-compression coefficients, and placing (508) the post-compression waveform in the table prior to the selecting (510). The system and method also include performing (504) a read-ahead operation on a sound file before selecting the post-compression waveform, the read-ahead operation indicating the post-compression waveform to be selected and supplied to the synthesis engine.

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