quantize

Functions

int main(int argc, char *argv[])

quantize [ option ] [ infile ]

• -v double

  • absolute maximum value \((0 < V)\)

• -b int

  • number of bits \((1 \le B)\)

• -t int

  • quantization type

    • 0 mid-rise

    • 1 mid-tread

• -o int

  • output format

    • 0 non-negative integer

    • 1 integer

• infile str

  • double-type data sequence

• stdout

  • int-type quantized data sequence

echo -2 -1 0 1 2 | x2x +ad | quantize -b 2 -v 2 -t 0 | x2x +ia
# 0, 1, 2, 3, 3
echo -2 -1 0 1 2 | x2x +ad | quantize -b 2 -v 2 -t 1 | x2x +ia
# 0, 0, 1, 2, 2

Parameters

• argc – [in] Number of arguments.

• argv – [in] Argument vector.

Returns

0 on success, 1 on failure.

See also

dequantize

class sptk::UniformQuantization

Perform uniform quantization.

The input is a value and the output is the corresponding index. There are two types of quantization, i.e., mid-rise and mid-tread.

Public Types

enum QuantizationType

Quantization type.

Values:

enumerator kMidRise

enumerator kMidTread

enumerator kNumQuantizationTypes

Public Functions

UniformQuantization(double absolute_maximum_value, int num_bit, QuantizationType quantization_type)

Parameters

• absolute_maximum_value – [in] Absolute maximum value.

• num_bit – [in] Number of quantization bits.

• quantization_type – [in] Quantization type.

inline double GetAbsoluteMaximumValue() const

Returns

Absolute maximum value.

inline int GetNumBit() const

Returns

Number of quantization bits.

inline QuantizationType GetQuantizationType() const

Returns

Quantization type.

inline bool IsValid() const

Returns

True if this object is valid.

inline int GetQuantizationLevels() const

Returns

Quantization levels.

bool Run(double input, int *output) const

Parameters

• input – [in] Input value.

• output – [out] Output index.

Returns

True on success, false on failure.