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KPCB INTERNET TRENDS 2016 | 2016 Internet Trends Report

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KPCB INTERNET TRENDS 2016 | PAGE
119
Voice Word Accuracy Rates Improving Rapidly...
+90% Accuracy for Major Platforms
Source: Baidu, Google, VentureBeat, SoundHound
Note: *Word Error Rate (WER) definitions are specific to each company. Word accuracy rate = 1 - WER. (1) Data shown is word accuracy rate on Mandarin speech recognition on one of Baidu's speech
tasks. Real world mobile phone speech data is very noisy and hard for humans to transcribe. A 3.5% WER is better than what most native speakers can accomplish on this task. WER across different
datasets and languages are generally not comparable. (2) Data as of 5/15 and refers to recognition accuracy for English language. Word error rate is evaluated using real world search data which is
extremely diverse and more error prone than typical human dialogue. (3) Data as of 1/16 and refers to recognition accuracy for English language. Word accuracy rate based on data collected from
thousands of speakers and real world queries with noise and accents.
Word Accuracy Rates by Platform*, 2012 – 2016
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Baidu
(2012 - 2016)
Google
(2013 - 2015)
Hound Voice Search
& Assistant App
(2012 - 2016)
WordAccuracyRate(%)
*Word accuracy rate definitions are unique to each company...see footnotes for more details
1 2 3

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