view matlab/bmm/carfac/CARFAC_Close_AGC_Loop.m @ 611:0fbaf443ec82

Carfac C++ revision 3, indluding more style improvements. The output structs are now classes again, and have separate storage methods for each output structure along with flags in the Run and RunSegment methods to allow for only storing NAPs if desired.

% Copyright 2012, Google, Inc.
% Author Richard F. Lyon
%
% This Matlab file is part of an implementation of Lyon's cochlear model:
% "Cascade of Asymmetric Resonators with Fast-Acting Compression"
% to supplement Lyon's upcoming book "Human and Machine Hearing"
%
% Licensed under the Apache License, Version 2.0 (the "License");
% you may not use this file except in compliance with the License.
% You may obtain a copy of the License at
%
%     http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
% See the License for the specific language governing permissions and
% limitations under the License.

function CF = CARFAC_Close_AGC_Loop(CF)
% function CF = CARFAC_Close_AGC_Loop(CF)

% fastest decimated rate determines interp needed:
decim1 = CF.AGC_params.decimation(1);

for ear = 1:CF.n_ears
  undamping = 1 - CF.ears(ear).AGC_state.AGC_memory(:, 1); % stage 1 result
  % Update the target stage gain for the new damping:
  new_g = CARFAC_Stage_g(CF.ears(ear).CAR_coeffs, undamping);
  % set the deltas needed to get to the new damping:
  CF.ears(ear).CAR_state.dzB_memory = ...
    (CF.ears(ear).CAR_coeffs.zr_coeffs .* undamping - ...
    CF.ears(ear).CAR_state.zB_memory) / decim1;
  CF.ears(ear).CAR_state.dg_memory = ...
    (new_g - CF.ears(ear).CAR_state.g_memory) / decim1;
end