quantization noise การใช้

• The in-band quantization noise can be approximated as:
• It is possible to make quantization noise more audibly benign by applying dither.
• Proper application of dither combats quantization noise effectively, and is commonly applied during DSP.
• The spectral components are quantized and coded keeping the quantization noise below the masked threshold.
• This is done to limit the temporal spread of quantization noise accompanying the transient . ( See psychoacoustics .)
• Certain kinds of A / D converters known as quantization noise in the upper portion of their output spectrum.
• Delta-sigma converters use a technique called noise shaping to move the quantization noise to the higher frequencies.
• The use of 16-bit amplitude sampling means quantization noise can be audible, thus the use of digital dithering.
• Because LSPs are not overly sensitive to quantization noise and stability is easily ensured, LSP are widely used for quantizing LPC filters.
• Such sampling expansions are not useful in practice since sampling noise, such as quantization noise, rules out stable interpolation and therefore any practical use.
• If the input signal is already noisy ( as is usually the case ), the signal's noise may be larger than the quantization noise.
• The Redbook CD standard uses 16 bits, which keep the quantization noise 96 dB below maximum amplitude, far below a discernible level with almost any source material.
• :Dither can be used in audio mastering to randomize the quantization error, and some dither systems use Noise shaping to spectral shape of the quantization noise floor.
• Oversampling a signal results in equal quantization noise per unit of bandwidth at all frequencies and a dynamic range that improves with only the square root of the oversampling ratio.
• It occurs in transform-based MPEG-4 AAC, and Vorbis, and is due to quantization noise being spread over the entire transform-window of the codec.
• Some users experience a high level of background hiss and quantization noise when using the Walkman feature at low volume levels, a problem that first appeared in a firmware update.
• The SQNR reflects the relationship between the maximum nominal signal strength and the quantization error ( also known as quantization noise ) introduced in the analog-to-digital conversion.
• :" It reveals intriguing semidiscrete stochastic decision-making on the part of Drosophila . . . " . . . or, it reveals aliasing due to quantization noise.
• Assuming that the sampling frequency \ scriptstyle f _ s \, \ gg \, f _ 0, the quantization noise in the desired signal bandwidth can be approximated as:
• This demonstrates the noise shaping effect of the delta-sigma modulator : the quantization noise is " pushed " out of the low frequencies up into the high-frequency range.