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fix left-right sound channels intermodulation

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Eugene Lozovoy
2024-09-17 23:12:12 +03:00
parent b4669e8aca
commit d35e1692eb
5 changed files with 281 additions and 16 deletions
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rtl/sound/compressor.v Normal file
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//============================================================================
// Audio compressor (signed samples)
//
// Copyright (C) 2018 Sorgelig
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//============================================================================
module compressor
(
input clk,
input [11:0] in1, in2,
output reg [15:0] out1, out2
);
reg [10:0] a1;
reg [10:0] a2;
reg in1_11;
reg in2_11;
always @(posedge clk) begin
in1_11 <= in1[11];
in2_11 <= in2[11];
a1 <= {11{in1[11]}} ^ in1[10:0];
a2 <= {11{in2[11]}} ^ in2[10:0];
out1 <= {in1_11, {15{in1_11}} ^ q1};
out2 <= {in2_11, {15{in2_11}} ^ q2};
end
//sin(x)
wire [14:0] q1;
wire [14:0] q2;
dpram #(.DATAWIDTH(15), .ADDRWIDTH(11), .MEM_INIT_FILE("rtl/sound/compressor.mif")) tbl
(
.clock (clk),
.address_a (a1),
.q_a (q1),
.address_b (a2),
.q_b (q2)
);
endmodule