Analyze the application fields of domestic audio digital-to-analog conversion chips

A digital-to-analog converter is a device used for digital-to-analog conversion. Digital signals are defined as discrete in time and discrete in magnitude. At the same time, the analog signal is defined as time continuous and continuous amplitude signal. A digital-to-analog converter converts fixed-point binary numbers (numbers of appropriate abstract precision) into physical measurements. The DAC works based on the Nyquist-Shannon sampling theorem. It states: An input signal can be recovered from its sampled output if the sampling rate is greater than or equal to twice the higher frequency components present in the input signal. There are several parameters that measure the performance of a DAC. Output signal bandwidth, signal to noise ratio are some parameters.

A DAC (Chinese: Digital-to-Analog Converter) is a device that converts a digital signal into an analog signal (in the form of current, voltage, or charge). The computer cannot directly process the sound signal. First, convert it into a digital signal that the computer can recognize, and then use the DAC in the sound card. It converts the sound signal into a digital signal, and it needs to be divided into two steps, namely sampling and conversion. .
Traditional audio compression technology is based on the human auditory model. This theory is based on the fact that near a certain frequency, the loud sound overwhelms the small sound, so that the small sound can be deleted; if a loud noise makes you unable to hear other sounds . In fact, people can't hear small sounds, but they can distinguish small sounds, and there is still something to listen carefully. So the DAC creates its own natural acoustic model, which guarantees the sense of resolution of all sounds.
Audio DAC means digital/analog converter, a device that converts digital signals into analog signals. The higher the number of bits in the DAC, the less distortion of the signal. The sound is also clearer and more stable.
Digital-to-analog converter (DAC) is one of the core components (although not necessarily expensive) for digital audio sources such as various CD players, SACD players, portable players and mobile phones. The DAC is responsible for converting the decoded digital audio stream into an analog audio signal. In this process, the chip plays a key role.