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Audio Signal Processing: Analog Devices
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An audio signal processing device includes a signal supply for supplying speech and music signals via one or more input channels. The device further includes a signal separator for separating the speech and music signals. A first converter converts the music signals into desired virtual widened signals from one or more input channels. A signal combiner used to combine the speech signals with the widened music signals.
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With $1.8 billion in revenues for the first three quarters of fiscal year 2000, Analog Devices is a leading manufacturer of precision high-performance integrated circuits used in analog and digital signal processing applications. Headquartered in Norwood, Massachusetts, the company employs approximately 8,600 people worldwide and has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, the Philippines and Taiwan. Analog Devices' stock is listed on the New York Stock Exchange and the company is included in the S&P 500 Index.
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Excluded from this class are two-way wired electrical audio signal transmission systems which are classified elsewhere. Transmissions of pulse signals which do not represent audio signals is classified elsewhere. Multiplex Communication Systems (except stereophonic multiplex systems) are classified elsewhere. Modulated Carrier Wave Communication Systems and devices are classified elsewhere. Combinations of subject matter of this class with structure of a more comprehensive combination (e.g., Television Set) are classified with the combination. (See References to Other Classes, below.)
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The DAC1 is a stereo 24 bit / 96khz D/A converter designed with the aim of keeping an absolutely uncompromised audio signal path. Much detail and thought was spent on the digital input as well as the analogue output stage. Both have in common the purest possible approach in audio design, aspiring for nothing less than excellence. This is coupled with an ergonomic design that gives the user immediate access to all necessary functions, while keeping an uncluttered and ... easy-to-use front panel. This combination makes a truly professional D/A converter catering for the highest expectations.
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FOR-A are proud to introduce a new signal processor that supports all formats: HD, SD, analog, digital, plus audio. The FA-9000 uses 12-bit internal processing for high quality images. The FA-9000 goes beyond the realm of a typical signal processor featuring numerous options like an up-converter, down-converter, color corrector, median-based noise reduction, logo generator and Dolby E decoder.
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With the increasing use of computers the usage and need of digital signal processing has increased. In order to use an analog signal on a computer it must be digitized with an analog to digital converter (ADC). Sampling is usually carried out in two stages, discretization and quantization. In the discretization stage, the space of signals is partitioned into equivalence classes and discretization is carried out by replacing the signal with representative signal of the corresponding equivalence class. In the quantization stage the representative signal values are approximated by values from a finite set.
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Analog Devices