Another technique used to improve the sound quality ( actually, to improve the dynamic range ), is companding.
12.
The use of companding allows signals with a large dynamic range to be transmitted over facilities that have a smaller dynamic range capability.
13.
Another approach is to use DSP in order to emulate analogue companding schemes in order to maintain compatibility between older analogue systems and newer systems.
14.
In 1970, H . Kaneko developed the uniform description of segment ( piecewise linear ) companding laws that had by then been adopted in digital telephony.
15.
In 1942, Clark and his team completed the SIGSALY secure voice transmission system that included the first use of companding in a PCM ( digital ) system.
16.
The companding used in ACSSB is a type of dynamic range reduction where in the difference in amplitude between the louder and softer sounds is reduced prior to transmission.
17.
Dolby B uses volume companding of high frequencies to boost low-level treble information by up to 9 dB, reducing them ( and the hiss ) on playback.
18.
An "'A-law algorithm "'is a standard companding algorithm, used in European 8-bit PCM ?law, used in North America and Japan.
19.
In the 1980s ( and'90s ), many of the music equipment manufacturers ( Roland, Yamaha, Korg ) used companding when compressing the library waveform data in their digital synthesizers.
20.
This scheme, known as " companding " or " compressing-expanding ", exploits the fact that the fidelity of voice signals is more sensitive to low amplitudes than to high amplitudes.
