In line with similar group calling offerings from FaceTime, WhatsApp, Skype and Facebook Messenger, participants could join or leave the conversation at any time. Support for eight-person video calls in both the iOS and Android versions of the app was added in May 2019. Users could leave messages up to 30 seconds long for contacts who were unavailable. Ī year later in March 2018, video and voice messages were added to Duo. The feature was first launched in Brazil, with a global rollout in April. In March 2017, it was announced that Google Duo would let users make audio-only calls. "Knock Knock" showed a live preview of the caller before the recipient picked up, which Google said was to "make calls feel more like an invitation rather than an interruption". Īccording to a technical study commissioned by Google from Signals Research Group in 2017 that compared degradation time over 3G, LTE, and Wi-Fi, Duo provided the highest voice and video quality of any service or app.
In February 2021, Google announced a new very low- bitrate codec for speech compression called " Lyra" that could operate with network speeds as low as 3kbps that avoided robotic voice audio and that was to be rolled out to Duo. For packet loss concealment Duo used WaveNetEQ.
Optimization was further achieved through the degradation of video quality through monitoring network quality. Google Duo was optimized for low- bandwidth mobile networks through WebRTC and uses QUIC over UDP. The Google Duo web app was redirected to the Google Meet web app. The merger began in August, with the Duo mobile app renamed to Meet and the original Meet app renamed "Meet Original" and scheduled to be phased out. In June 2022, Google reversed course and announced that Duo and Meet would, in fact, be merged. In December 2021 this objective had been dropped, but Duo continued to be available and updated. In August 2020, it was reported that Google was planning to eventually merge Google Duo with the business-oriented Google Meet. In December 2016, Google Duo replaced Hangouts within the suite of Google apps device manufacturers must install in order to gain access to the Google Play Store, with Hangouts instead becoming optional. Google announced in 2022 that the service would be merged into Google Meet, and it was shut down by the end of the year. Google Duo was announced at Google's developer conference on May 18, 2016, and began its worldwide release on August 16, 2016. Duo could be used either with a phone number or a Google account, allowing users to call someone from their contact list. It let users make and receive one-to-one and group audio and video calls with other Duo users in high definition, using end-to-end encryption by default. Google Duo was a proprietary voice over IP (VoIP) and videotelephony service developed by Google, available for Android, iOS and web browsers.
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