XinuPhone
XinuPhone promotes hands-on interactive learning that is both cross-discipline and application-oriented. As a research tool, XinuPhone is a versatile and open-source platform useful for benchmarking experimental methods against industry standards. Furthermore, the XinuPhone platform features inexpensive commodity hardware that is easy to assemble, making it an ideal choice for users on tight budgets and from diverse educational backgrounds. Most of the Embedded Xinu supported platforms do not have the ability to directly sample analog signals or reconstruct analog waveforms from digital bitstreams. Likewise, typical digital signal processing (DSP) chips lack Ethernet networking hardware and protocol support. XinuPhone pairs a simple external sampling module with a network-enabled backend running the Embedded Xinu operating system to provide both functionalities. The XinuPhone audio module consists of filters, a digital signal controller (DSC), an audio amplifier, and a serial transceiver. Speech first passes through an analog low-pass anti-aliasing filter before it enters the analog-to-digital converter (ADC) on the DSC. The DSC can be programmed with a variety of software CODECs that compress the sampled audio for efficient transmission across the serial bus. The serial transceiver allows the audio module to interface directly with an RS-232 capable network device, such as a slightly modified Linksys WRT54GL router. The audio module sends serial samples to the network device; then, the Embedded Xinu operating system VoIP tools packetize the serial data and send the voice packets to a remote host. On the receiving end, another network device buffers incoming packets and translates the payloads back into a stream of serial data. The external audio module uses the same CODECs to uncompress the serial data back into raw audio samples. Lastly, a digital-to-analog converter (DAC) on-board the DSC converts the audio samples back to an analog waveform that can be amplified and played back.
The XinuPhone system is designed as a comprehensive platform for audio processing and networking, utilizing a modular approach that integrates various components for enhanced functionality. The core of the system is the digital signal controller (DSC), which manages the processing of audio signals. It is equipped with an analog-to-digital converter (ADC) that digitizes incoming audio signals after they have been filtered through an anti-aliasing filter. This filtering is crucial for preventing high-frequency noise from being sampled and ensures that the digital representation accurately reflects the original audio waveform.
The audio module's architecture allows for the implementation of various software CODECs, which are essential for compressing audio data before transmission. This compression is vital for reducing the bandwidth required for communication over the serial bus, thereby facilitating efficient data transfer to network devices. The serial transceiver plays a pivotal role in communication, allowing the audio module to connect with RS-232 capable devices. This capability is particularly useful for integrating with existing network infrastructure, such as routers, which can further extend the functionality of the XinuPhone system.
Once the audio data is transmitted to a network device, the Embedded Xinu operating system employs Voice over Internet Protocol (VoIP) tools to packetize the audio data. This packetization prepares the data for transmission over IP networks, ensuring that it can be effectively routed to a remote host. Upon arrival at the destination, the incoming packets are buffered and processed, converting the data back into a serial format for playback.
The external audio module's ability to decompress the serial data back into raw audio samples is facilitated by the same CODECs used during the compression phase. Finally, the digital-to-analog converter (DAC) on the DSC is responsible for converting the digital audio samples back into an analog waveform. This conversion allows the audio to be amplified and played back through standard audio output devices, completing the audio processing chain and enabling real-time communication capabilities.
Overall, the XinuPhone platform exemplifies a robust solution for educational and experimental applications in digital signal processing and networking, providing a practical and cost-effective means for users to engage with and learn about these technologies.XinuPhone promotes hands-on interactive learning that is both cross-discipline and application oriented. As a research tool, XinuPhone is a versatile and open-source platform useful for benchmarking experimental methods against industry standards.
Furthermore, the XinuPhone platform features inexpensive commodity hardware that is easy to assemble making it an idea choice for users on tight budgets and in diverse educational backgrounds. Most of the Embedded Xinu supported platforms do not have the ability to directly sample analog signals or reconstruct analog waveforms from digital bitstreams. Likewise, typical digital signal processing (DSP) chips lack Ethernet networking hardware and protocol support.
XinuPhone pairs a simple external sampling module with a network-enabled backend running the Embedded Xinu operating system in order to provide both functionalities. The XinuPhone audio module consists of filters, a digital signal controller (DSC), an audio amplifier, and a serial transceiver.
Speech first passes through an analog low-pass anti-aliasing filter before it enters the analog to digital converter (ADC) on the DSC. The DSC can be programed with a variety of software CODECs that compress the sampled audio for efficient transmission across the serial bus.
The serial transceiver allows the audio module to interface directly with an RS-232 capable network device, such as a slightly modified Linksys WRT54GL router. The audio module sends serial samples to the network device; then, the Embedded Xinu operating system VoIP tools packetize the serial data and send the voice packets to a remote host.
On the receiving end, another network device buffers incoming packets and translates the payloads back into a stream of serial data. The external audio module uses the same CODECs to uncompress the serial data back into raw audio samples.
Lastly, a digital to analog converter (DAC) on-board the DSC converts the audio samples back to an analog waveform that can be amplified and played back. 🔗 External reference
The XinuPhone system is designed as a comprehensive platform for audio processing and networking, utilizing a modular approach that integrates various components for enhanced functionality. The core of the system is the digital signal controller (DSC), which manages the processing of audio signals. It is equipped with an analog-to-digital converter (ADC) that digitizes incoming audio signals after they have been filtered through an anti-aliasing filter. This filtering is crucial for preventing high-frequency noise from being sampled and ensures that the digital representation accurately reflects the original audio waveform.
The audio module's architecture allows for the implementation of various software CODECs, which are essential for compressing audio data before transmission. This compression is vital for reducing the bandwidth required for communication over the serial bus, thereby facilitating efficient data transfer to network devices. The serial transceiver plays a pivotal role in communication, allowing the audio module to connect with RS-232 capable devices. This capability is particularly useful for integrating with existing network infrastructure, such as routers, which can further extend the functionality of the XinuPhone system.
Once the audio data is transmitted to a network device, the Embedded Xinu operating system employs Voice over Internet Protocol (VoIP) tools to packetize the audio data. This packetization prepares the data for transmission over IP networks, ensuring that it can be effectively routed to a remote host. Upon arrival at the destination, the incoming packets are buffered and processed, converting the data back into a serial format for playback.
The external audio module's ability to decompress the serial data back into raw audio samples is facilitated by the same CODECs used during the compression phase. Finally, the digital-to-analog converter (DAC) on the DSC is responsible for converting the digital audio samples back into an analog waveform. This conversion allows the audio to be amplified and played back through standard audio output devices, completing the audio processing chain and enabling real-time communication capabilities.
Overall, the XinuPhone platform exemplifies a robust solution for educational and experimental applications in digital signal processing and networking, providing a practical and cost-effective means for users to engage with and learn about these technologies.XinuPhone promotes hands-on interactive learning that is both cross-discipline and application oriented. As a research tool, XinuPhone is a versatile and open-source platform useful for benchmarking experimental methods against industry standards.
Furthermore, the XinuPhone platform features inexpensive commodity hardware that is easy to assemble making it an idea choice for users on tight budgets and in diverse educational backgrounds. Most of the Embedded Xinu supported platforms do not have the ability to directly sample analog signals or reconstruct analog waveforms from digital bitstreams. Likewise, typical digital signal processing (DSP) chips lack Ethernet networking hardware and protocol support.
XinuPhone pairs a simple external sampling module with a network-enabled backend running the Embedded Xinu operating system in order to provide both functionalities. The XinuPhone audio module consists of filters, a digital signal controller (DSC), an audio amplifier, and a serial transceiver.
Speech first passes through an analog low-pass anti-aliasing filter before it enters the analog to digital converter (ADC) on the DSC. The DSC can be programed with a variety of software CODECs that compress the sampled audio for efficient transmission across the serial bus.
The serial transceiver allows the audio module to interface directly with an RS-232 capable network device, such as a slightly modified Linksys WRT54GL router. The audio module sends serial samples to the network device; then, the Embedded Xinu operating system VoIP tools packetize the serial data and send the voice packets to a remote host.
On the receiving end, another network device buffers incoming packets and translates the payloads back into a stream of serial data. The external audio module uses the same CODECs to uncompress the serial data back into raw audio samples.
Lastly, a digital to analog converter (DAC) on-board the DSC converts the audio samples back to an analog waveform that can be amplified and played back. 🔗 External reference