8D711W05SN

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8D711W05SN is a high-end digital signal processor chip used for digital signal processing and audio processing. It is developed by STMicroelectronics and introduced technologically advanced architectures and algorithms for improved audio performance. It combines a suite of audio-processing capabilities in a single die, including equalization, up-sampling, and a wide range of crossover algorithms. This article will discuss the application field and working principle of the 8D711W05SN digital signal processor.

Application Field
The 8D711W05SN is suitable for a variety of applications in digital signal processing and audio processing, such as mobile phones, smart speakers, home entertainment systems, automotive audio systems, video game consoles, and other multimedia devices. It supports multiple configurable processing and control modes, allowing it to match external audio input and output signals that are further optimized for the best audio performance.

Working Principle
The 8D711W05SN chip has two primary goals: audio enhancement and signal processing. The chip is equipped with a 32-bit ARM Cortex-M0 core processor, along with an array of audio DSP sub-modules to support audio processing. It also utilizes hardware acceleration for audio algorithms such as equalization, up-sampling, and a wide range of crossover algorithms. The chip also contains 8-channel, 24-bit digital audio converters (either ADCs or DACs) to capture or play back audio signals.

The audio processing path includes analog-to-digital/digital-to-analog conversion, filtering, channel equalization, crossover, and output limiting. In the analog-to-digital conversion path, the audio signals are converted from analog to digital using one of the 8-channel audio ADCs. The digital signal is then filtered through a multi-stage FIR filter to remove out of band noise. A multi-channel equalizer is used to equalize the audio signals in each channel, before the signal enters a cascade of crossovers for multi-way speaker system. The crossover speaker response is further tuned by using active pass-band and gain sculpting. The output of the high-pass filter is then routed to the digital-to-analog converter for the high frequency speakers and the output of the low-pass filter is routed to the digital-to-analog converter for the low frequency speakers. At the end of the signal processing path, the output from the DACs is limited to avoid clipping or power related distortion.

The 8D711W05SN chip also integrates with an external audio software framework to provide configurable audio control. It supports a variety of external devices such as microphones, sensors, buttons, and interfaces for controlling audio tuning parameters as well as system operation. It also provides multi-channel audio processing parameters control and sound profile processing capabilities, allowing the users to configure the sound output based on their preferences.

The 8D711W05SN is a high-end digital signal processor chip used for digital signal processing and audio processing. It combines a suite of audio-processing capabilities in a single die, including equalization, up-sampling, and a wide range of crossover algorithms into an integrated solution. The chip is suitable for a variety of applications in digital signal processing and audio processing, such as mobile phones, smart speakers, home entertainment systems, automotive audio systems, video game consoles, and other multimedia devices. It also integrates with an external audio software framework to provide configurable audio control and sound profile processing capabilities, allowing users to configure the sound output to their preference.

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