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Importation et exportation de signaux

S’interfacer avec des signaux externes

Vous pouvez utiliser les blocs et les System objects de lecture et d’écriture de fichier de DSP System Toolbox™ pour lire et écrire des données dans des fichiers audio, binaires et MAT. L’objet dsp.SignalSource et les blocs comme Signal From Workspace et To Workspace (Simulink) vous permettent d’importer et d’exporter des signaux depuis l’espace de travail MATLAB^®. Les objets et blocs UDP Send et Receive vous permettent d’émettre des paquets de données sur le réseau UDP. Vous pouvez également jouer de l’audio sur la carte son de votre équipement avec l’objet et le bloc Audio Device Writer.

Objets

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Fichier

`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

Espace de travail

dsp.SignalSource Import variable from workspace

Dispositifs et réseau

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

Blocs

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Fichier

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

Espace de travail

From Workspace	Load signal data from workspace into Simulink model
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	Log data to workspace from Simulink model

Dispositifs et réseau

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

Rubriques

Fichiers binaires

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.

Espace de travail

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.

Dispositifs et réseau

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.