信号导入和导出

对接外部信号

使用 DSP System Toolbox™ 中的文件读取器和写入器 System object 和模块，您可以在音频文件、二进制文件和 MAT 文件中读取和写入数据。dsp.SignalSource 对象和模块（如 Signal From Workspace 和 To Workspace (Simulink)）使您能够在 MATLAB^® 工作区中导入和导出信号。UDP Send 和 Receive 对象和模块使您能够通过 UDP 网络传输数据包。您还可以使用 Audio Device Writer 对象和模块在设备的声卡上播放音频。

对象

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文件

`dsp.AudioFileReader`	Stream from audio file
`dsp.AudioFileWriter`	Stream to audio file
`dsp.BinaryFileReader`	Read data from binary file
`dsp.BinaryFileWriter`	Write data to binary files
`dsp.MatFileReader`	Read MAT file
`dsp.MatFileWriter`	Write MAT file

工作区

dsp.SignalSource Import variable from workspace

设备和网络

`audioDeviceWriter`	Play to sound card
`dsp.UDPReceiver`	Receive UDP packets from the network
`dsp.UDPSender`	Send UDP packets to network

模块

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文件

Binary File Reader	Read data from binary files
Binary File Writer	Write data to binary files
From Multimedia File	Stream from multimedia file
To Multimedia File	Stream video frames and audio samples to multimedia file

工作区

From Workspace	将信号数据从工作区加载到 Simulink 模型中
Signal From Workspace	Import signal from MATLAB workspace
Triggered Signal From Workspace	Import signal samples from MATLAB workspace when triggered
Triggered To Workspace	Write input sample to MATLAB workspace when triggered
To Workspace	将数据从 Simulink 模型记录到工作区

设备和网络

Audio Device Writer	Play to sound card
UDP Receive	Receive UDP packets on a given IP port
UDP Send	Send UDP message

主题

二进制文件

Write and Read Binary Files
Use dsp.BinaryFileReader and dsp.BinaryFileWriter to read and write data to binary files.
Write and Read Matrix Data
Use dsp.BinaryFileReader and dsp.BinaryFileWriter to read and write matrix data to binary files.
Write and Read Fixed-Point Data
Write and read fixed-point data.
Write and Read Character Data
Write and read character data.
Write and Read Binary Files in Simulink
Write data to a binary file and read the same data in Simulink^®.
Write and Read Matrix Data from Binary Files in Simulink
Write matrix data to a binary file. Read the data as a real matrix and a complex matrix.
Write and Read Fixed-Point Data from Binary Files in Simulink
Write and read fixed-point data from a binary file.
Write and Read Character Data from Binary Files in Simulink
Write and read character data from a binary file.
Change the Endianness of the Data in Simulink
Change the endianness of the data in simulink.

工作区

Import and Export Signals for Sample-Based Processing
Import signals from the MATLAB workspace into your DSP model and export signals from your signal processing model to the MATLAB workspace. The signals are configured for sample-based processing.
Import and Export Signals for Frame-Based Processing
Import signals from the MATLAB workspace into your signal processing model and export signals from your signal processing model to the MATLAB workspace. The signals are created for frame-based processing.

设备和网络

Byte Transmission Using UDP
Use the dsp.UDPSender and dsp.UDPReceiver objects to send and receive UDP packets over the network.
Transmit Complex Data over UDP Network
Transmit complex STFT data over UDP network.
Data Transmission Using UDP in Simulink
Transmit and receive a sine wave signal over UDP network.
Decrease Underrun
Examine the Audio Device Writer block in a Simulink® model, determine underrun, and decrease underrun.