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Commit 796325b6 authored by Jean-Michel Trivi's avatar Jean-Michel Trivi
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Fix bug 2449814 

 Reduced the amount of filtering and amplification at the output
 of the Pico TTS engine v1.1.0.2

Change-Id: I89f577b5e94e171b4ed892faffb863f19428cc1a
parent 83835359

packages/TtsService/src/android/tts/SynthProxy.java

+4 −4
Original line number Diff line number Diff line
@@ -36,9 +36,9 @@ public class SynthProxy { 
    // Such a huge filter gain is justified by how much energy in the low frequencies is "wasted" at

    // the output of the synthesis. The low shelving filter removes it, leaving room for

    // amplification.

    private final static float PICO_FILTER_GAIN = 5.5f; // linear gain

    private final static float PICO_FILTER_LOWSHELF_ATTENUATION = -18.0f; // in dB

    private final static float PICO_FILTER_TRANSITION_FREQ = 1100.0f;     // in Hz

    private final static float PICO_FILTER_GAIN = 4.0f; // linear gain

    private final static float PICO_FILTER_LOWSHELF_ATTENUATION = -16.0f; // in dB

    private final static float PICO_FILTER_TRANSITION_FREQ = 1000.0f;     // in Hz

    private final static float PICO_FILTER_SHELF_SLOPE = 1.0f;            // Q



    //
@@ -50,7 +50,7 @@ public class SynthProxy { 
     */

    public SynthProxy(String nativeSoLib) {

        boolean applyFilter = nativeSoLib.toLowerCase().contains("pico");

        Log.v(TtsService.SERVICE_TAG, "about to load "+ nativeSoLib + ", applyFilter="+applyFilter);

        Log.v(TtsService.SERVICE_TAG, "1000 about to load "+ nativeSoLib + ", applyFilter="+applyFilter);

        native_setup(new WeakReference<SynthProxy>(this), nativeSoLib);

        native_setLowShelf(applyFilter, PICO_FILTER_GAIN, PICO_FILTER_LOWSHELF_ATTENUATION,

                PICO_FILTER_TRANSITION_FREQ, PICO_FILTER_SHELF_SLOPE);