File syn_dsp.c

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Fixed-Point DSP implementation for Discrete Cosine Transform.

• #include "syn_dsp.h"
• #include <math.h>

Public Functions

Type	Name
SYN_Status	syn_dsp_dct2_q7 (const q7_t * time_series, size_t num_samples, q7_t * dct_coeffs, size_t num_coeffs) Compute Type-II Discrete Cosine Transform (DCT-II) on Q7 data.

Public Functions Documentation

function syn_dsp_dct2_q7

Compute Type-II Discrete Cosine Transform (DCT-II) on Q7 data.

SYN_Status syn_dsp_dct2_q7 (
    const q7_t * time_series,
    size_t num_samples,
    q7_t * dct_coeffs,
    size_t num_coeffs
) 

Transforms time-domain sensor samples into frequency-domain coefficients. Formula: X_k = Sum_{n=0}^{N-1} x_n * cos(pi/N * (n + 0.5) * k)

Parameters:

• time_series Pointer to input time-domain sample vector (length = num_samples).
• num_samples Number of time-domain input samples.
• dct_coeffs Destination vector for frequency coefficients (length = num_coeffs).
• num_coeffs Number of output frequency coefficients to retain (num_coeffs <= num_samples).

Returns:

SYN_OK on success, SYN_INVALID_PARAM on failure.

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The documentation for this class was generated from the following file src/syntropic/dsp/syn_dsp.c