curioustorvald/tsvm
1
0
Fork 0
mirror of https://github.com/curioustorvald/tsvm.git synced 2026-03-07 19:51:51 +09:00
Code Issues Packages Projects Releases Wiki Activity

TAD: more tuning

Browse Source
This commit is contained in:
minjaesong
2025-11-08 02:04:11 +09:00
parent aa9ecee7ca
commit c0d1d54bed
3 changed files with 43 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
video_encoder/decoder_tad.c
View File

@@ -172,28 +172,28 @@ static int calculate_dwt_levels(int chunk_size) {
// Deadband thresholds (must match encoder)
static const float DEADBANDS[2][10] = {
{ // mid channel
0.10f, // LL (L9) DC
0.03f, // H (L9) 31.25 hz
0.03f, // H (L8) 62.5 hz
0.03f, // H (L7) 125 hz
0.03f, // H (L6) 250 hz
0.02f, // H (L5) 500 hz
0.02f, // H (L4) 1 khz
0.005f, // H (L3) 2 khz
0.005f, // H (L2) 4 khz
0.005f // H (L1) 8 khz
0.20f, // LL (L9) DC
0.06f, // H (L9) 31.25 hz
0.06f, // H (L8) 62.5 hz
0.06f, // H (L7) 125 hz
0.06f, // H (L6) 250 hz
0.04f, // H (L5) 500 hz
0.04f, // H (L4) 1 khz
0.01f, // H (L3) 2 khz
0.01f, // H (L2) 4 khz
0.01f // H (L1) 8 khz
},
{ // side channel
0.10f, // LL (L9) DC
0.03f, // H (L9) 31.25 hz
0.03f, // H (L8) 62.5 hz
0.03f, // H (L7) 125 hz
0.03f, // H (L6) 250 hz
0.02f, // H (L5) 500 hz
0.02f, // H (L4) 1 khz
0.005f, // H (L3) 2 khz
0.005f, // H (L2) 4 khz
0.005f // H (L1) 8 khz
0.20f, // LL (L9) DC
0.06f, // H (L9) 31.25 hz
0.06f, // H (L8) 62.5 hz
0.06f, // H (L7) 125 hz
0.06f, // H (L6) 250 hz
0.04f, // H (L5) 500 hz
0.04f, // H (L4) 1 khz
0.01f, // H (L3) 2 khz
0.01f, // H (L2) 4 khz
0.01f // H (L1) 8 khz
}};
// Fast PRNG state (xorshift32) for stochastic reconstruction
@@ -604,7 +604,7 @@ static void dequantize_dwt_coefficients(int channel, const int8_t *quantized, fl
// Generate Laplacian-distributed noise scaled to deadband width
// Use scale = threshold/3 to keep ~99% of samples within [-threshold, +threshold]
float noise = laplacian_noise(deadband_threshold / 3.0f);
float noise = tpdf1() * deadband_threshold / 10.0f;
// Clamp to deadband range
if (noise > deadband_threshold) noise = deadband_threshold;