MC145483EJR2

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MC145483EJR2 Application Field and Working Principle

The MC145483EJR2 is a monolithic integrated digital audio CODEC (Compression/Decompression) developed by Motorola, Inc. The CODEC provides PCM digital audio interface and G.711 A/uLaw compressed digital interface for VoIP audio applications. It is a multi-channel digital interface device with high performance. It is suit for both telephone/communication networks and audio/video devices.

Application Field of MC145483EJR2

The MC145483EJR2 is suitable for both telephone/communication networks and audio/video devices. In the field of telephone/communication networks, it is used as the interface between the telecommunication network and the analog terminal equipment. It provides PCM digital audio interface and G.711 A/uLaw compressed digital interface for VoIP audio applications. And it is also used as remote controller for switching, short message device and other related telecommunication services.

In the field of Audio/video devices, it provides interfaces between digital audio and video devices or between different digital audio/video devices. It supports digital audio encoding/decoding and video encoding/decoding. Besides, it can be used as the audio/video signal interface controller in the digital audio/video decoder, audio player and video displayer.

Working Principle of MC145483EJR2

The MC145483EJR2 is a digital CODEC chip. This chip adopts advanced signal processing algorithms, and the digital audio processing is based on the audio signal compression, which is called data compression. The process includes two parts: encoding and decoding. The encoding part divides the original audio signal into two parts, one is the signal energy portion, and the other part is the remaining energy portion. The signal energy part is stored as an audio description data in the encoding/decoding equipment. And the remaining energy portion is discarded. The data compression ratio varies depending on the quality of the audio signal. At the decoding part, the audio description data stored in the encoding/decoding equipment is restored, so as to reconstruct the original audio signal.

The MC145483EJR2 is a multi-channel digital audio/video interface device. It supports PCM digital audio/video interface and G.711 A/uLaw compressed digital audio/video interface. It has a sampling frequency of 8 kHz or 16 kHz and a bitrate of 8Kbps or 16Kbps. It also supports digital video encoding/decoding. The encoded digital video signal is a digital signal using the H.264/MPEG-4 video coding standard to achieve the video data transmission without loss.

Brife Summary

The MC145483EJR2 is a monolithic integrated digital audio CODEC (Compression/Decompression). It is suitable for both telephone/communication networks and audio/video devices. The encoding/decoding part of the MC145483EJR2 is based on the data compression technology, and the audio/video interface device is able to support PCM digital audio/video interface and G.711 A/uLaw compressed digital audio/video interface. The MC145483EJR2 can be used in digital audio/video decoding, audio players, video displayers and other applications.

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