Importazione ed esportazione dei segnali

Interfacciarsi con segnali esterni

Utilizzando i System object e i blocchi di DSP System Toolbox™ per la lettura e la scrittura di file, è possibile leggere e scrivere dati da file audio, file binari e file MAT. L'oggetto dsp.SignalSource e i blocchi come Signal From Workspace e To Workspace (Simulink) consentono di importare ed esportare i segnali dal workspace di MATLAB^®. Gli oggetti e i blocchi UDP Send e Receive consentono di trasmettere pacchetti di dati sulla rete UDP. È inoltre possibile utilizzare l'oggetto e il blocco Audio Device Writer per riprodurre l'audio sulla scheda audio del dispositivo.

Oggetti

espandi tutto

File

`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

Workspace

dsp.SignalSource Import variable from workspace

Dispositivi e rete

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

Blocchi

espandi tutto

File

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

Workspace

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	Registrare i dati nel workspace dal modello di Simulink

Dispositivi e rete

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

Argomenti

File binari

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.

Workspace

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.

Dispositivi e rete

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.