File extension ad2

Name: Audio Files

Popularity: 0

Open With: ZFax

What is this ad2 file?

The file extension AD2 is used as the ADCPM, or Adaptive Differential Pulse Code Modulation 2-bit compressed voice file for the ZFax software. These contain compressed files using the waveform codec, which quantize the difference among a prediction of a speech signal and the actual speech signal. Files in the .ad2 file extension are different from those that use PCM codecs that quantize speech directly. PCM is waveform encoding at its simplest form.Also known as Pulse Code Modification, this digital representation of analog signals regularly samples the magnitude of signals in uniform intervals, so that it can be quantized in a digital code. In ADCPM, if there is an accurate prediction of the speech signal, the difference between the predicted and the real sample will have less variance than the actual speech samples, and will then be quantized with lesser bits than would be necessary to quantize the original.Files in the .ad2 file extension contain quantized files that have undergone a process, where the continuous range of values has been approximated by a small set of integer values or discrete symbols. ADCPM compressed voice files with the .ad2 file extension have been reduced in the necessary bandwidth for a particular signal to noise ratio.The difference between predicted signals and the original signal is quantized in files with an .ad2 file extension, to be able to send fax through compressed voice files through the ZFax Software, in a Zaurus SL5500 PDA in a Linux Platform. ZFax is a tool that enables you to send and receive faxes directly from the graphic user interface of the Zaurus PDA. ZFax has additional features such as a fax viewer. It lets you share your phone numbers in the internal address book as well.