Python LSPDF Examples

Example #1

def test_LSPDF(order):
    from pysptk.synthesis import LSPDF

    def __test_synthesis(filt):
        # dummy source excitation
        source = __dummy_source()

        hopsize = 80

        # dummy filter coef.
        windowed = __dummy_windowed_frames(source,
                                           frame_len=512,
                                           hopsize=hopsize)
        lpc = pysptk.lpc(windowed, filt.order)
        lsp = pysptk.lpc2lsp(lpc)
        # make sure lsp has loggain
        lsp[:, 0] = np.log(lsp[:, 0])

        # synthesis
        synthesizer = Synthesizer(filt, hopsize)
        y = synthesizer.synthesis(source, lsp)
        assert np.all(np.isfinite(y))

    __test_synthesis(LSPDF(order))

Example #2

File: test_synthesis.py Project: taroc/pysptk

 def __test(order):
     __test_synthesis(LSPDF(order))

Example #3

                            hop_length=HOP_LENGTH).astype(np.float64).T
frames *= pysptk.blackman(FRAME_LENGTH)  # 窓掛け（ブラックマン窓）

# ピッチ抽出
pitch = pysptk.swipe(x,
                     fs=fs,
                     hopsize=HOP_LENGTH,
                     min=MIN_F0,
                     max=MAX_F0,
                     otype="pitch")

# 励振源信号(声帯音源)の生成
source_excitation = pysptk.excite(pitch, HOP_LENGTH)

# 線形予測分析による線形予測符号化(LPC)係数の抽出
lpc = pysptk.lpc(frames, ORDER)
lpc[:, 0] = np.log(lpc[:, 0])

# LPC係数を線スペクトル対に変換
lsp = pysptk.lpc2lsp(lpc, otype=0, fs=fs)

# 全極フィルタの作成
synthesizer = Synthesizer(LSPDF(order=ORDER), HOP_LENGTH)

# 励振源信号でフィルタを駆動して音声を合成
y = synthesizer.synthesis(source_excitation, lsp)

# 音声の書き込み
y = y.astype(np.int16)
wavfile.write(OUT_WAVE_FILE, fs, y)