Digital Processing of Audio Signals
The processing of audio signals is increasingly being carried out by DSPs (Digital Signal Processors), which in turn requires the use of analog filters and AD/DA converters.
CODICO offers top-quality ADCs and DACs that meet the highest audio requirements with a sampling frequency of 192 kHz and a word width of 24 bits. The range is rounded off by mixed signal SoCs (System on Chips) with integrated DSPs and audio codecs.Contacts News
Advantages of the Digital Processing of Audio Signals
- No aging: Analog elements are subject to an aging process, which means that their transmission performance deteriorates over time.
- Higher precision: Due to manufacturing tolerances and temperature dependency, analog systems never work 100% identical. In contrast, digital systems always process in exactly the same way.
- Reasonable price
- Storage: Unlike analog audio signals, digital audio signals can be stored
Despite all these advantages of digital signal processing, it is not possible to do without analog elements completely. Before digitization, the audio signal must be limited in its bandwidth, and this is done by analog low-pass filtering. Similarly, after the digital-analog conversion, the step-shaped output signal must be smoothed with a low-pass filter. In addition to the filters, audio applications also use other analog elements, such as amplifiers. Amplifiers enhance the input signal before digitization according to the input range of the ADC. Conversely, amplifiers are used after the DA conversion, e.g. to control loudspeakers. And when using Class D amplifiers, the output signal must again be smoothed with an analog low-pass filter.
Manufacturers & Contacts
AKM offers customers optimized solutions using a wide range of semiconductor sensors. AKM uses analog/digital mixed-signal processes as a technology. Especially the audio and voice ICs, which combine high sound quality with low power consumption, have made AKM a major player in the high-end audio IC market.Infos Samples
KNOWLES is market leader and global supplier of performance audio, intelligent audio as well as special components for mobile communication, consumer electronics, hearing health, military/space and other industrial end markets. In 2001 the first surface-mounted MEMS (Micro-Electrical-Mechanical-Systems) microphone was introduced by KNOWLES. With the addition of Audience in 2015, a mobile voice and audio-processing company, KNOWLES offers a comprehensive range of products for applications in the audio system area.Infos Samples
Monolithic Power Systems, Inc. (MPS) is amongst the globally leading suppliers in the power-management area. The broad portfolio contains eg DC/DC-converters and -modules, PMICs, battery-management-ICs, current-sensors, AC/DC-converter-ICs, motordrivers as well as angle-sensors and, newly added, even inductors for the DC/DC-converters. Target markets are mainly industrial, automotive, telecom-infrastructure, cloud-computing and consumer-applications.Infos Samples
NUVOTON Technology was founded to bring customers new solutions inspired by innovation. NUVOTON is a digital / analog / mixed signal semiconductor manufacturer.
SYNAPTICS is a leading IC supplier for human interface and audio products for applications in the consumer market and smart home. SYNAPTICS' broad portfolio includes audio processors, ultra low power codecs and best-in-class far-field ADCs.Infos Samples