Optimization Design Of Wireless Terminal's Audio Quality

With the rapid development of wireless terminals, the requirements for voice quality are getting higher and higher, improve the voice quality is the goal which R&D engineers pursuit of. This dissertation will introduce the measures to improve voice quality include hardware design, software algorithm and audio testing.Hardware design will first introduce the overall Datang HW architecture, deeply explain the audio part of the circuit design. Try to introduce HW architecture, audio reference design and electrical interface characteristics, let engineers master the audio hardware architecture and design ideas to develop related products and this is useful for future post-debugging.Software algorithm will introduce Datang, ADI, NXP platform audio parameters, emphasis on echo algorithm principles. Compare similarities and differences, advantages and disadvantages between Datang, ADI, NXP platform. Summary echo debugging techniques and precaution measures, provide a good solution to cancel echo. Through modify audio parameters to reduce echo and background noise, in order to improve sound quality.Audio testing will introduce the structures of voice testing system and the functions of audio test instruments. At the same time detailed explain the audio test principles, test methods, test items and test standards, let R&D engineers better understand how to properly evaluate the merits of voice quality.Practices have proved that the methods can improve voice quality well. It has a good universality and reference significance for most wireless terminal devices.