Make and answer phone calls Detect tone and pulse digit from the phone line Capture Caller ID Support blind transfer, single-step transfer/conference, consultation transfer/conference, hold, unhold. Control of the local phone handset, microphone and speaker of the modem Send and receive faxes Play and record on the phone line or sound card Play music in background mode Silence detection VU Meter Wave sound editor that allows your end-users to edit their own sound files. Voice recognition and voice synthesis. Full control over the serial port device ZModem file transfer utility File compression and encryption utility
上傳時間： 2013-11-30
上傳用戶：水中浮云
This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, these symbols were mapped using Gray mapping. Report
標簽： communication computers software wireless
上傳時間： 2014-05-29
上傳用戶：wangdean1101
Commercially available active noise control headphones rely on fixed analog controllers to drive "anti-noise" loudspeakers. Our design uses an adaptive controller to optimally cancel unwanted acoustic noise. This headphone would be particularly useful for workers who operate or work near heavy machinery and engines because the noise is selectively eliminated. Desired sounds, such as speech and warning signals, are left to be heard clearly. The adaptive control algorithm is implemented on a Texas Instruments (TI™ ) 1 TMS320C30GEL digital signal processor (DSP), which drives a Sony CD550 headphone/microphone system. Our experiments indicate that adaptive noise control results in a dramatic improvement in performance over fixed noise control. This improvement is due to the availability of high-performance programmable DSPs and the self-optimizing and tracking capabilities of the adaptive controller in response to the surrounding noise.
標簽： Commercially controllers headphones available
上傳時間： 2013-12-04
上傳用戶：dyctj
USB音頻方案,USB聲卡方案1. 描述ATE1133是一顆包含音頻編解碼器、HIFI級單麥克風輸入和立體聲耳機輸出解決方案。內部集成多個模塊，包括高速&全速USB Host/Device收發器(PHY)，ARM??Cortex?-M4?32-bit?MCU內核主頻96MHZ，16bit ADC采樣率：48、96KHZ、16bit DAC采樣率：48、96KHZ，支持標準安卓耳機線控按鍵控制，支持美標CTIA帶耳機插拔檢測。它非常適用于USB C型桌面拓展塢、數據音頻HUB、視頻會議、Type-c耳機、C型音頻轉接頭、USB話務耳機、USB車載AUX音頻線等應用。此外還支持上位機Windows PC端軟件界面在線調試仿真和更新片內flash閃存。2.特點·符合USB 2.0全速運行·符合USB AUDIO & HID設備類規范·支持Headset模式·支持microphone模式·支持Speaker模式·支持硬件設置三種模式切換·支持左右聲道平衡·麥克風Audio-ADC參數： 采樣率：48、96KHZ 位寬：16Bit THD+N=0.005% SNR≥98 Bias電壓：3V·立體聲耳機輸出Audio-DAC參數： 采樣率：48、96KHZ 位寬：16Bit THD+N=0.003%(RL=32Ω) RL輸出擺幅=1.6V 直驅16/32Ω耳機，最大功率35mW·內置低功耗ARM核心，全速運行功耗=3.3V@18ma，功耗0.06mW·支持線控耳機模式：上一曲、下一曲、播放/暫停、點按音量加減、長按音量連續加減·芯片單電源供電：3.3~5V-MAX·32針腳QFN32 4X4 封裝
上傳時間： 2022-03-22
上傳用戶：shjgzh
高通藍牙芯片QCC5144 詳細規格手冊datasheet （共99頁）含各個接口說明，應用原理圖等信息。 QualcommTrueWireless? stereo earbuds (無線雙耳） Features（特點） ■ Qualifiedto Bluetooth v5.2 specification （藍牙協議標準5.2） ■ 120 MHz Qualcomm ? Kalimba ? audio DSP （120MHz 的音頻DSP處理器） ■ 32 MHz/80MHz Developer Processor for applications ■ Firmware Processor for system ■ Flexible QSPI flash programmable platform （可編程的QSPI外掛存儲器） ■ High-performance 24?bit audio interface （高性能的24位音頻接口） ■ Digital and analog microphone interfaces （含 數字 及模擬 MIC接口） ■ Flexible PIO controller and LED pins with PWM support ■ Serial interfaces: UART, Bit Serializer (I2C/SPI), USB 2.0 （支持串口，I2C， SPI，USB 接口） ■ Advanced audio algorithms （高級的音頻算法） ■ ActiveNoise Cancellation: （支持ANC 主動降噪功能） Hybrid, Feedforward, and Feedback modes, using Digital or Analog Mics, enabled using license keys available from Qualcomm? ■ Qualcomm ? aptX ? and aptX HD Audio （支持獨特的aptx 功能）
上傳時間： 2022-04-07
上傳用戶：
高通藍牙芯片QCC3040 詳細規格手冊datasheet （共96頁）QualcommTrueWireless? stereo earbuds (無線雙耳）Features（特點）■ Qualifiedto Bluetooth v5.2 specification （藍牙協議標準5.2）■ 120 MHz Qualcomm ? Kalimba ? audio DSP （120MHz 的音頻DSP處理器）■ 32 MHz Developer Processor for applications （32MH的 應用處理器）■ Firmware Processor for system■ Flexible QSPI flash programmable platform （可編程的QSPI外掛存儲器）■ High-performance 24?bit audio interface （高性能的24位音頻接口）■ Digital and analog microphone interfaces （含 數字 及模擬 MIC接口）■ Flexible PIO controller and LED pins with PWM support■ Serial interfaces: UART, Bit Serializer (I2C/SPI), USB 2.0 （支持串口，I2C， SPI，USB 接口）■ Advanced audio algorithms （高級的音頻算法）■ ActiveNoise Cancellation: （支持ANC 主動降噪功能）Hybrid, Feedforward, and Feedback modes, using Digitalor Analog Mics, enabled using license keys available from Qualcomm?■ Qualcomm ? aptX ? and aptX HD Audio （支持獨特的aptx 功能）
上傳時間： 2022-04-09
上傳用戶：slq1234567890
