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Industry Articles Paving the way for the next generation audio codec for True Wireless Stereo (TWS) applications - PART 2 : Increasing play time By Hai YU, Clément MOULIN (Dolphin Design) In this second part of Paving the way for the next generation audio codec for True Wireless Stereo (TWS) applications whitepaper, energy efficiency will be discussed and several means to achieve extra-long playtime will be exposed. Figure 1 highlights the functions under discussion amongst the main functionalities embedded in earbuds. Fig.1: Functional blocks of a typical TWS earbud chip 1- About power consumption When thinking about TWS audio systems in daily use, there are several ways to enhance the customer experience and provide a hassle-free user interface integration. One of the critical issues TWS system designers are facing is playtime, because battery space is usually very limited in TWS earbuds. In a TWS system, the tiny battery constrains the po ....