—— FORTEMEDIA PRODUCT INTRODUCTION ——
—— FM1288 Product Introduction ——
FM-1288 is a new generation of voice processor specially designed by Fudi Technology for driving applications, which can effectively provide:
- Noise reduction of uplink and downlink signals
- Full duplex echoless communication
- The Bright Voice Enhancement (BVE) function intelligently equalizes the output of the speaker to improve the user's auditory senses.
- Natural, zero distortion sound
- Provide Wideband voice processing for emerging mobile broadband calls
Advantage
- The most cost-effective IC solution at the same level provides efficient Speech processing for hands-free calls on the vehicle
- Convenient System integration: the contact is clearly defined, simple and direct, and can be flexibly applied
- Both proximal and remote users benefit
- Voice processor specially designed for driving environment, supporting built-in and nomadic PND devices
- Unlimited operating system
FM1288 Function
- Highly integrated mixed signal IC, including on chip ROM code and RAM Speech processing function
- On chip DSP with hardware computing accelerator
- Built in ADC and DAC for dual microphone input, analog line level reference input, line out, and line level speaker output
- 8 kHz and 16 kHz configured sampling frequencies
- Analogy I/O SNR: 85 dB
- Line in and line out digital signals using a digital interface (PCM or I2S)
- Analogy I/O adopts Programmable Gain Controller (PGA) and differential I/O
- Crystal or pulse input
- User selectable dual microphone input
- Co processor mode
Support for SHI interface - Standalone mode:
Support for serial-EEPROM interface - Elastic host interface:
Control: SHI (I2C compatible), UART
Materials: PCM, I2S, Analog I/O - Easy to interconnect with general Bluetooth ICs
- Vehicle grade
Application
The FM1288 chip is mainly used in communication products that use digital transmission methods such as Bluetooth, Ethernet, WIFI, telephone line, and 2.4G, making it easy to connect with various systems.
- Smart home intercom product, visual intercom doorbell.
- Enterprise video conferencing system, international business conferences, remote teaching, remote healthcare, remote conferences, remote training, remote recruitment and other equipment.
- Elderly and child monitoring, monitoring instrument intercom equipment.
- Network hands-free call system.
- Intelligent community, villa access control intercom system.
- Various broadcasting and intercom systems such as elevators, corporate office buildings, and production workshops.
- Intelligent multimedia educational call products.
- Vehicle intelligent communication system.
- Bluetooth call sound system.
- Supports hands-free intercom transfer on mobile phones.
- Handsfree calling tablet.
- Enterprise multi-party conference hands-free call system.
—— Example of FM1288 Circuit Design Block Diagram ——
FM1288 Digital audio interface
Explanation:
1) Upstream: Analog MIC signal enters FM1288, sends digital audio signal through PCM/I2S interface, and sends it to AP or CODEC as mic signal;
2) Downstream: AP or CODEC receives audio and sends it to FM1288 through the PCM/I2S interface. The output analog SPKOUT signal is amplified by PA and played by the speaker.
3) Function: Echo cancellation, noise reduction. Consumer communication products with only digital interfaces. Currently, it is widely used in car phones and other Bluetooth communication scenarios.
FM1288 Analog Audio Interface 1
Explanation:
1) Upstream: The analog MIC signal enters FM1288, and after processing, the analog signal is output by LINEOUT and sent to the backend AP or CODEC for processing;
2) Downstream: AP or CODEC sends the downstream analog signal to FM1288 through the line for downstream processing and echo cancellation reference, and then outputs it to PA through SPKOUT for amplification before being played by the speaker.
3) Function: Echo cancellation, noise reduction. It is recommended to use when strong echo cancellation is required. Used for consumer communication products with analog interfaces.
FM1288 Analog Audio Interface 2
Explanation:
1) Upstream: The analog MIC signal enters FM1288, and after processing, the analog signal is output by LINEOUT, which is sent to the mobile phone through AP and BT for transmission;
2) Downstream: AP or CODEC sends the downstream analog signal to FM1288 through the line for echo cancellation reference, and outputs it to PA for speaker playback.
3) Function: Weak echo cancellation, noise reduction. Only used when voice recognition is required while playing music. Currently, it is mainly used for vehicle and machine purposes.
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