In order for each audio application to achieve the best user experience, consumer PCs typically have an audio peripheral that fills their desk. Depending on the task, the user needs to modify the audio settings in the software and actually convert between different peripherals. For example, an external PC speaker or an LCD monitor sound-bar is a good choice for listening to music, but to make or extract an IM voice call, users often have to switch to headphones and microphones.
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The widely used IM voice function actually prefers the cordless method of hands-free loudspeakers. While different peripherals offer unique benefits for specific tasks, the rich choices are extremely confusing for consumers, bringing a confusing desktop that is rarely used. Consumers can really benefit from the new digital, all-in-one sound system that combines the power of PC speakers with the convenience of hands-free amplifiers and other portable media players or smartphones. Equally important, it provides a simple and intuitive user interface that will free users from the hassle of learning how to operate specific functions.
A new and comprehensive experience in different situations
Intoxicating music and video experience:
• When choosing a PC speaker for music and/or video applications, consumers are concerned about loudness, desk space, and number of channels. Because of the limited space and the difficulty of balancing between a small volume and a monotonous soundstage, most users end up with small 2/2.1 channel speakers. Recent advances in audio DSPs have the potential to improve the user experience by dynamically controlling volume and frequency echoes, as well as by cleverly controlling the psychoacoustic perception phase of the extended 3D sound field.
Improve the voice of social networks:
One of the most challenging issues with PC VoIP applications is echo residue. To reduce this speaker-to-microphone feedback problem, some IM networks are trying to suppress echo from the system. This approach is often unreliable due to system or network latency. Some IM applications simply advise users to wear a headset for better quality. Even worse, most people install multiple IM applications on their PCs to keep in touch with friends and relatives on different IM networks. The lack of Acoustic Echo Cancellation (AEC) or changing echo reduces the performance of different IM networks, giving end users a bad experience, and is also an important issue for PC-based VoIP that is difficult to apply on a large scale. For audio peripherals, supporting hardware AEC that is independent of the IM network and operating system (OS) is critical. Other features that reduce speech background noise and suppress interference are also popular with IM users.
Helps achieve greater game interactivity:
An example is a multi-party game where participants need the ability to communicate with other players. Currently, this requires the purchase of a headset. Moreover, in order for the outgoing voice to be clear and not affected by the background sound, the players must let their hands leave the joystick to press the one-way chat button. The player expects a two-way, hands-free loudspeaker that works well with the background sound – all without leaving their hands with the joystick.
Improve distance learning:
· Distance learning is becoming increasingly popular around the world, especially in higher education. For example, according to the Sloan Consortium survey, more than 96% of leading colleges and universities in the United States offer online courses. This trend will continue to grow as schools of all grades need to consider more ways to meet students' lifestyles, safety and learning preferences, rather than the opposite. The webinar tools used today are primarily one-way video streams. Students still need to call the studio or text message to inform the teacher to ask questions. The ability of teachers to observe student appointments is limited and there is no way to urge classroom discussions. A low-cost unified communication can support two-way video conferencing, which will greatly improve the quality of the distance education experience.
Improve the effectiveness of remote work:
According to the Diieringer Research Group's 2005 survey, there are 26.1 million people in the US at least one day a month, and 22.2 million people work at home one at a time at least one week. Some companies have built remote workforces using VPN softphones that allow managers to reach distant employees simply by dialing their PBX extension. However, without proper audio peripherals, the quality of the call can be very bad. Some of the reasons for poor quality calls may be echoes, squeaky sounds, low volume, and annoying background noise. These issues can be solved with an audio peripheral that supports HD voice-level echo cancellation and noise reduction. Other features, such as 360-degree (conference room session) to 40-degree (private conversation) switching between microphone selection range, can increase the flexibility of remote work office and work style.
Multi-functional audio peripheral challenges
Vendors want to develop a digital, all-in-one PC sound system that often focuses on two main issues.
Cost: In order to find the best price in the market, audio designers are subject to strict cost budgets when choosing the right codecs, controllers, headsets and speaker amplifiers, audio/voice processors and matching software.
Reference Design Support: Developing an all-in-one audio solution requires expertise in the audio and voice industries. While designers can try to combine speaker reference designs and loudspeaker reference designs from different chip (technical) vendors to create a new multi-chip custom design, it is very important to get support from one vendor to optimize audio and voice performance. difficult.
Conexant's CX20562 is an innovative on-chip speaker solution that combines the functions of a digital audio/speech processor, audio codec and class D amplifier with a cost-effective 48-pin quad flat no-lead (QFN) ) package. This solution is optimized for stereo, high-fidelity 24-bit DACs for music generation. It also features a built-in echoless amplifier with wideband AEC and noise reduction hardware DSP. The combination of high-quality music speakers and voice amplifiers takes advantage of the latest technological advances in full CMOS-structured mixed-signal and DSP integration. This off-the-shelf solution eliminates the need for multi-chip reference designs and helps audio designers easily and cost-effectively design integrated products for high-definition audio and voice applications.
The CX20562 supports many value-added features on the market such as music-on-on, Aux fade-in/out, BrightSound, DSP array microphones, Global System for Mobile Communications (GSM) noise immunity, and SMS messaging buttons. The CX20562 has a plug-and-play USB interface for PC connectivity and an auxiliary analog input for other audio peripheral connections. The device supports digital and analog volume control, microphone mute and speaker mute. The CX20562 has an additional interface to the 20-key programmable keypad and LCD display interface. The built-in Class D amplifier has the ability to drive a 1.2 W 4Ω load from a USB host power supply. The efficiency of Class D amplifiers makes them ideal for portable audio applications.
For higher output applications, the external amplifier can be connected to the CX20562 via the headphone/line level output.
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