API

DHDenoiserConfig

---

Builder

DHDenoiserConfig.Builder is a builder class that initializes and configures a DHDenoiserConfig instance.

info

licenseKey is a mandatory parameter.

DHDenoiserConfig.Builder(String licenseKey)

If you want to set the sample rate and frame size differently, you can configure them as follows:

Java

String LICENSE_KEY = "YOUR_LICENSE_KEY"
int sampleRate = 48000;
int frameSize = 768; // 16ms @48kHz

DHDenoiserConfig denoiserConfig = new DHDenoiserConfig.Builder(LICENSE_KEY)
        .setSampleRate(sampleRate)
        .setFrameSize(frameSize)
        .build();

DHDenoiser.init(this, denoiserConfig);

Kotlin

val LICENSE_KEY = "YOUR_LICENSE_KEY"
val sampleRate = 48000
val frameSize = 768 // 16ms @48kHz

val denoiserConfig = DHDenoiserConfig.Builder(LICENSE_KEY)
    .setSampleRate(sampleRate)
    .setFrameSize(frameSize)
    .build()

DHDenoiser.init(this, denoiserConfig)

setSampleRate

Java

DHDenoiserConfig setSampleRate(int sampleRate)

Kotlin

setSampleRate(sampleRate: Int): DHDenoiserConfig

The default sample rate is 16000Hz. The currently additionally supported sample rate is 48000Hz. If you want to change the sample rate, you can use setSampleRate.

setFrameSize

Java

DHDenoiserConfig setFrameSize(int frameSize)

Kotlin

setFrameSize(frameSize: Int): DHDenoiserConfig

Specifies the size of the audio frame processed each time via the process function. The default frame size is 128 at 16kHz, which is the minimum frame size.

tip

You can adjust the frame size through this method, but it can only be set to multiples of the minimum frame size. If you are using a sample rate of 16000Hz, you can set it to 128, 256, 384, etc.

DHDenoiser

---

init

Java

void init(Context applicationContext, DHDenoiserConfig denoiserConfig)

Kotlin

init(applicationContext: Context, denoiserConfig: DHDenoiserConfig): Unit

Once the instance creation is completed using the DHDenoise.Builder, you can perform the resource allocation and initialization required for noise reduction using the init function.

isExpired

Java

boolean isExpired()

Kotlin

isExpired(): Boolean 

If the SDK Key has expired, the initialization process will not be completed properly. You can use isExpired to check for license expiration.

Here's an example of how to use this method:

Java

// 초기화 코드 ...

DHDenoiser.init(this, denoiserConfig);

if (DHDenoiser.isExpired()) {
    Log.e("DHDenoiser", "SDK has expired");
}

Kotlin

// 초기화 코드 ...

DHDenoiser.init(this, denoiserConfig)

if (DHDenoiser.isExpired()) {
    Log.e("DHDenoiser", "SDK has expired")
}

destroy

Java

void destroy()

Kotlin

destroy(): Unit

Releases all allocated resources.

caution

You must call this method before exiting the app to release all resources.

This is an example of how to use this method:

Java

DHDenoiser.destroy()

Kotlin

DHDenoiser.destroy()

process

Java

void process(float[] input, float[] output)

Kotlin

process(input: FloatArray, output: FloatArray): Unit

Processes the input audio data for noise reduction.

Parameter

• input: The input audio buffer you want to denoise
• output: Denoised output audio buffer

process

Java

void process(float[] input, float[] output, float denoiserLevel)

Kotlin

process(input: FloatArray, output: FloatArray, denoiserLevel: Float): Unit

Processes the input audio data for noise reduction.

Parameter

• input: The input audio buffer you want to denoise
• output: Denoised output audio buffer
• denoiserLevel: Adjusts the level of noise reduction, and must be in the range 0.0 ~ 1.0.
  • 0.0: Equivalent to not removing noise
  • 1.0: Noise Reduction to the max (default)

This is an example of how to use this method:

Java

float denoiserLevel = 0.8f;
int frameSize = 128; // default size
float[] input = new float[frameSize];
float[] output = new float[frameSize];

DHDenoiser.process(input, output, denoiserLevel);

Kotlin

val denoiserLevel = 0.8f
val frameSize = 128 // default size
val input = FloatArray(frameSize)
val output = FloatArray(frameSize)

DHDenoiser.process(input, output, denoiserLevel)

enableDenoiser()

Java

void enableDenoiser()

Kotlin

enableDenoiser(): Unit

This method enables the noise reduction feature. The initial state has the noise reduction enabled.

disableDenoiser()

Java

void disableDenoiser()

Kotlin

disableDenoiser(): Unit

This method disables the noise reduction feature. It is set to output the original audio data without noise reduction.

isDenoiserEnabled()

Java

boolean isDenoiserEnabled()

Kotlin

isDenoiserEnabled(): Boolean

This method returns whether the noise reduction feature is currently enabled.

You can implement a noise reduction Toggle feature as follows:

Java

if (DHDenoiser.isDenoiserEnabled()) {
  DHDenoiser.disableDenoiser();
} else {
  DHDenoiser.enableDenoiser();
}

Kotlin

if (DHDenoiser.isDenoiserEnabled()) {
  DHDenoiser.disableDenoiser()
} else {
  DHDenoiser.enableDenoiser()
}