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| TI手提音频设备解决方案 | |||||
作者：TI 文章来源：本站 点击数： 更新时间：2007-3-18  |
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Portable audio equipment is evolving from audio to include music videos, TV shows, talking books, personal slideshows, organizers and more. TI offers a broad portfolio of products focused directly at portable audio equipment. Block Diagram  Design Considerations With the continuing explosion of portable consumer audio devices ranging from MP3 players to smart phones with integrated audio capability, handheld GPS systems and many others, the required integrated audio feature set continues to challenge end-equipment manufacturers as well as IC designers. Being portable typically implies that the devices are battery-operated and therefore system power consumption is a key concern. Portable audio ICs for the consumer audio market include integrated audio codecs or audio ADCs and DACs for conversion between analog signals and digital data, headphone or speaker drivers for earpieces, headphones or built-in speakers, programmable DSPs for encoding/decoding compressed data in such formats as MP3, WMA or AAC, microcontrollers for handling system-level control and user interface functions, and wireless transceivers for transmission/reception of data over RF. The core subsystems include: DSP - performs the audio/encode functions, executes post-processing algorithms like eq and bass management and system related tasks like file management and the user interface control. Memory - stores executing code and data/parameters. Peripheral Interface - allows user to control I/Os and display. Audio/voice CODEC - interface with the phone lines, audio input, microphone, headphone, and speaker for digitizing the audio in the DSP. Power Conversion - converts the battery power to run various functional blocks. Application Notes Using Digital Microphone Function on TLV320AIC33 with AIC33EVM/USB-MODEM System (slaa275.htm, 9 KB) 28 Nov 2005 Abstract SOCA Brief (sprt375.pdf, 165 KB) 30 Sep 2005 Download TLV320AIC3x WinCE 5.0 Drivers (slaa265.htm, 9 KB) 27 Sep 2005 Abstract The Built-In AGC Function in TSC2100/2101 & TLV320AIC26/28/32/33 Devices (slaa260.htm, 9 KB) 13 Sep 2005 Abstract |
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