Hint Boost. Positive value will increase the probability that a specific
phrase will be recognized over other similar sounding phrases. The higher
the boost, the higher the chance of false positive recognition as well.
Negative boost values would correspond to anti-biasing. Anti-biasing is not
enabled, so negative boost will simply be ignored. Though boost can
accept a wide range of positive values, most use cases are best served with
values between 0 and 20. We recommend using a binary search approach to
finding the optimal value for your use case.
A list of strings containing words and phrases "hints" so that
the speech recognition is more likely to recognize them. This can be used
to improve the accuracy for specific words and phrases, for example, if
specific commands are typically spoken by the user. This can also be used
to add additional words to the vocabulary of the recognizer. See
usage limits.
List items can also be set to classes for groups of words that represent
common concepts that occur in natural language. For example, rather than
providing phrase hints for every month of the year, using the $MONTH class
improves the likelihood of correctly transcribing audio that includes
months.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThis document outlines the \u003ccode\u003eSpeechContext\u003c/code\u003e class within the Google Cloud Speech V1 API, specifically version 3.0.0, and details its role in providing hints to the speech recognizer.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eSpeechContext\u003c/code\u003e is a class that implements several interfaces, including \u003ccode\u003eIMessage\u003c/code\u003e, \u003ccode\u003eIEquatable\u003c/code\u003e, \u003ccode\u003eIDeepCloneable\u003c/code\u003e, and \u003ccode\u003eIBufferMessage\u003c/code\u003e, to offer functionalities for message handling, equality checks, deep cloning, and buffer management.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eBoost\u003c/code\u003e property of the \u003ccode\u003eSpeechContext\u003c/code\u003e class allows users to increase or decrease the likelihood of specific phrases being recognized, with positive values increasing the probability, and values between 0 and 20 being most common.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePhrases\u003c/code\u003e property within \u003ccode\u003eSpeechContext\u003c/code\u003e is a list of strings, or hints, that guide the speech recognition process towards specific words or phrases, also allowing the use of word classes to represent common language concepts.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the \u003ccode\u003eSpeechContext\u003c/code\u003e class available is 3.8.0, with multiple past versions going back to 2.2.0 available for use.\u003c/p\u003e\n"]]],[],null,[]]
