|
AudioFile (company)
AudioFile was a software company that was founded in Massachusetts in 1990. It was founded under Venture Capital Investment by the Massachusetts Technology Development Corporation. Their early product was AudioFile Business Audio, a suite of applications that included AudioRecorder, a program to embed audio into email and documents, and AudioEditor, a program to edit audio and apply various effects to the audio. The software included Audio timescale-pitch modification, the ability to change the speed of audio without changing the pitch, and a codec to compress audio to approximately 36 times smaller than uncompressed audio to save disk space and reduce bandwidth when sending via email. AudioFile Business Audio evolved into TalkWorks, a program designed to allow computers equipped with an appropriate fax- modem to act as a software-based telephone answering machine, for receiving voice mail as well as faxes, and a virtual telephone/speaker phone with speed dial and other buttons. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Audio Timescale-pitch Modification
Time stretching is the process of changing the speed or duration of an audio signal without affecting its pitch. Pitch scaling is the opposite: the process of changing the pitch without affecting the speed. Pitch shift is pitch scaling implemented in an effects unit and intended for live performance. Pitch control is a simpler process which affects pitch and speed simultaneously by slowing down or speeding up a recording. These processes are often used to match the pitches and tempos of two pre-recorded clips for mixing when the clips cannot be reperformed or resampled. Time stretching is often used to adjust radio commercials and the audio of television advertisements to fit exactly into the 30 or 60 seconds available. It can be used to conform longer material to a designated time slot, such as a 1-hour broadcast. Resampling The simplest way to change the duration or pitch of an audio recording is to change the playback speed. For a digital audio recording, this can be accomp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Codec
A codec is a device or computer program that encodes or decodes a data stream or signal. ''Codec'' is a portmanteau of coder/decoder. In electronic communications, an endec is a device that acts as both an encoder and a decoder on a signal or data stream, and hence is a type of codec. ''Endec'' is a portmanteau of encoder/decoder. A coder or encoder encodes a data stream or a signal for transmission or storage, possibly in encrypted form, and the decoder function reverses the encoding for playback or editing. Codecs are used in videoconferencing, streaming media, and video editing applications. History In the mid-20th century, a codec was a device that coded analog signals into digital form using pulse-code modulation (PCM). Later, the name was also applied to software for converting between digital signal formats, including companding functions. Examples An audio codec converts analog audio signals into digital signals for transmission or encodes them for storage. A receiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modem
A modulator-demodulator or modem is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio. A modem transmits data by Modulation#Digital modulation methods, modulating one or more carrier wave signals to encode digital information, while the receiver Demodulation, demodulates the signal to recreate the original digital information. The goal is to produce a Signal (electronics), signal that can be transmitted easily and decoded reliably. Modems can be used with almost any means of transmitting analog signals, from light-emitting diodes to radio. Early modems were devices that used audible sounds suitable for transmission over traditional telephone systems and leased lines. These generally operated at 110 or 300 bits per second (bit/s), and the connection between devices was normally manual, using an attached telephone handset. By the 1970s, higher speeds of 1,200 and 2,400 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delrina
Delrina Corporation was an Form (document), electronic form company in Canada that was acquired by the American software firm NortonLifeLock, Symantec in 1995. The company was best known for WinFax, a software package which enabled computers equipped with fax modems to transmit copies of documents to standalone fax machines or other similarly equipped computers. It also sold PerForm and FormFlow. Delrina also produced a set of screensavers, including one that resulted in a well-publicized lawsuit for copyright and trademark infringement (''Berkeley Systems, Berkeley Systems Inc. v. Delrina''). The case set a precedent in American law whereby satire, satiric commercial software products are not subject to the same First Amendment to the United States Constitution, First Amendment exemptions as parody, parodic cartoons or literature. It also sold online communications software with its WinComm product and produced a Web browser called Cyberjack. The firm was sold to NortonLifeLoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
