FPGA-based PCM audio playing apparatus, system and method

Abstract

The invention discloses an FPGA-based PCM audio playing apparatus, system and method. The playing of an audio signal is mainly finished; and a playing signal is sent to a broadband data bus for playing after being logically processed through an FPGA from an audio server. The composition complexity of a recording system is lowered and a playing channel is reusable; the system cost is reduced; the system capacity is large; the data playing is stable; the phenomenon of voice data loss difficultly occurs; and an output side continuously extracts data from a dual-port RAM and transmits the data to the broadband bus for transmitting the data to a target user, so that the data subjected to high-speed buffer can be continuously transmitted to the user. The scheme can be widely applied to various PCM audio playing systems.

Description

technical field [0001] The invention relates to the field of digital audio playback, in particular to a PCM audio playback device, system and method. Background technique [0002] PCM: Pulse Code Modulation, pulse code modulation. The processing of the sound waveform usually adopts pulse code modulation coding, that is, PCM coding. PCM converts continuously changing analog signals into digital codes through three steps of sampling, quantization and encoding. [0003] At present, the recording systems available on the market usually add recording equipment to the telephone line, and the audio is stored on the recording server and used for playback and listening. This solution has the following defects: [0004] 1. The playback system has many equipments and the system is complex; [0005] 2. The function of the playback channel is single, resulting in a waste of channel resources; [0006] 3. The capacity of the system is small. Since the capacity of the playback buffer i...

AI Technical Summary

Problems solved by technology

[0004] 1. The playback system has many equipments and the system is complex;

[0005] 2. The function of the playback channel is single, resulting in a waste of channel resources;

[0006] 3. The capacity of the system is small. Since the capacity of the playback buffer is limited, the buffer may always be full and cause overflow or data overwriting resulting in data loss

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