Multiplierless 2-band perfect reconstruction quadrature mirror filter (PR-QMF) banks
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United States of America Patent
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May 30, 1995
Grant Date -
N/A
app pub date -
Mar 18, 1993
filing date -
Mar 18, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The Multiplierless Quadrature Mirror Filter concept is used in the design of analysis and synthesis filter banks to be used for the sub-band coding of various types of signals. The individual filters in the analysis and synthesis filter banks are designed to be near linear in phase, non-symmetrical in time, and to have equal bandwidth frequency responses. These multiplierless filters are relatively easy to implement in hardware and allow for the sub-band coding of signals with minimal computational complexity so as to result perfect signal reconstruction. Furthermore, these filters are particularly well suited for configuration in hierarchical sub-band structures.
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