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
標(biāo)簽： phone and Capture Detect
上傳時(shí)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(biāo)簽： communication computers software wireless
上傳時(shí)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(biāo)簽： Commercially controllers headphones available
上傳時(shí)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(jí)單麥克風(fēng)輸入和立體聲耳機(jī)輸出解決方案。內(nèi)部集成多個(gè)模塊，包括高速&全速USB Host/Device收發(fā)器(PHY)，ARM??Cortex?-M4?32-bit?MCU內(nèi)核主頻96MHZ，16bit ADC采樣率：48、96KHZ、16bit DAC采樣率：48、96KHZ，支持標(biāo)準(zhǔn)安卓耳機(jī)線控按鍵控制，支持美標(biāo)CTIA帶耳機(jī)插拔檢測(cè)。它非常適用于USB C型桌面拓展塢、數(shù)據(jù)音頻HUB、視頻會(huì)議、Type-c耳機(jī)、C型音頻轉(zhuǎn)接頭、USB話務(wù)耳機(jī)、USB車載AUX音頻線等應(yīng)用。此外還支持上位機(jī)Windows PC端軟件界面在線調(diào)試仿真和更新片內(nèi)flash閃存。2.特點(diǎn)·符合USB 2.0全速運(yùn)行·符合USB AUDIO & HID設(shè)備類規(guī)范·支持Headset模式·支持microphone模式·支持Speaker模式·支持硬件設(shè)置三種模式切換·支持左右聲道平衡·麥克風(fēng)Audio-ADC參數(shù)： 采樣率：48、96KHZ 位寬：16Bit THD+N=0.005% SNR≥98 Bias電壓：3V·立體聲耳機(jī)輸出Audio-DAC參數(shù)： 采樣率：48、96KHZ 位寬：16Bit THD+N=0.003%(RL=32Ω) RL輸出擺幅=1.6V 直驅(qū)16/32Ω耳機(jī)，最大功率35mW·內(nèi)置低功耗ARM核心，全速運(yùn)行功耗=3.3V@18ma，功耗0.06mW·支持線控耳機(jī)模式：上一曲、下一曲、播放/暫停、點(diǎn)按音量加減、長(zhǎng)按音量連續(xù)加減·芯片單電源供電：3.3~5V-MAX·32針腳QFN32 4X4 封裝
標(biāo)簽： ate1133 音頻 解碼芯片 usb typec
上傳時(shí)間： 2022-03-22
上傳用戶：shjgzh
高通藍(lán)牙芯片QCC5144 詳細(xì)規(guī)格手冊(cè)datasheet （共99頁(yè)）含各個(gè)接口說(shuō)明，應(yīng)用原理圖等信息。 QualcommTrueWireless? stereo earbuds (無(wú)線雙耳） Features（特點(diǎn)） ■ Qualifiedto Bluetooth v5.2 specification （藍(lán)牙協(xié)議標(biāo)準(zhǔn)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(chǔ)器） ■ High-performance 24?bit audio interface （高性能的24位音頻接口） ■ Digital and analog microphone interfaces （含 數(shù)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(jí)的音頻算法） ■ ActiveNoise Cancellation: （支持ANC 主動(dòng)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(dú)特的aptx 功能）
上傳時(shí)間： 2022-04-07
上傳用戶：
高通藍(lán)牙芯片QCC3040 詳細(xì)規(guī)格手冊(cè)datasheet （共96頁(yè)）QualcommTrueWireless? stereo earbuds (無(wú)線雙耳）Features（特點(diǎn)）■ Qualifiedto Bluetooth v5.2 specification （藍(lán)牙協(xié)議標(biāo)準(zhǔn)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(yīng)用處理器）■ Firmware Processor for system■ Flexible QSPI flash programmable platform （可編程的QSPI外掛存儲(chǔ)器）■ High-performance 24?bit audio interface （高性能的24位音頻接口）■ Digital and analog microphone interfaces （含 數(shù)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(jí)的音頻算法）■ ActiveNoise Cancellation: （支持ANC 主動(dòng)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(dú)特的aptx 功能）
上傳時(shí)間： 2022-04-09
上傳用戶：slq1234567890
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