Iphone google voice recognition api

SKSession offers a permanent connection to the Nuance server. To use SpeechKit in the application:. Create an account at the Nuance Developers portal. This action will create the appropriate keys for the production, which you must add to the project before sending it to be reviewed in Nuance. After checking the application, you will then need to activate your account using the appropriate payment model.


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Add the SpeechKit framework to the project. It is available on CocoaPods. Using the methods offered by the SKTransaction delegate, it interacts with the server and processes speech recognition.


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There are some limitations. More information can be found here. Maximum transactions per day — Maximum of concurrent transactions per day — 2. Maximum free transactions per month — 20, Maximum number of dictionaries — Maximum number of phrases — The advantage of this service is relatively high recognition accuracy.

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Disadvantages include restrictions on requests and dictionaries as well as the need to choose a paid model. At the core of the service lies machine learning in the Google Cloud. In the Cloud Platform Console , open the Projects page and select or create a new project. Next, you will need to configure the project in the Google console.

Step-by-step instructions can be found here. The next step is to set up an account for this service. Since there is not currently an official SDK for iOS, developers have to rely on examples of implementation from both the official site and from the other sources. You can use this service both for previously recorded audio files and for real-time recognition. Speech recognition is free for an audio file longer than one minute. Despite this, a demo project for iOS is available on the official site, and there are several third-party libraries from independent developers as well. For the basic version, the query limit is 10, per day.

Speech recognition is available only in Russian, English, Ukrainian, and Turkish. Standard language models are available: short queries, texts, addresses, music, dates, names, numbers, orders. If the query is not clear, the system returns XML with several recognition options. In addition, you can mark a custom graphical interface for speech recognition, which is available by default. To use Yandex SpeechKit in the application:. Use delegate methods to process speech recognition results:. The main advantages of this system are the high quality of recognition, the choice of language model, and the options available for recognized speech.

The disadvantage in comparison with other systems is the limitation of only four languages. The following tables summarize the speech recognition services:. Usually requires an Internet connection. It is native API. No configuration except It is native API. You can use the supportedLocales method to get a list of supported locales. A locale can be supported, but the speech recognizer can be unavailable. For example, some locales require an Internet connection to use a speech recognizer. Need to add OpenEars. Phrases dictionary is limited — more words in dictionary harder to process.

Not stable — stops recognizing time-to-time. English, Chinese, French, Spanish, German. Others understood to be incompatible with AppStore. Need to create an application in Google console. Phrases per request. The API recognizes over 80 languages and variants. Create and configure an application in Nuance developer console. Limitations on max devices and max transactions per day. Sandbox and production limits are different. Requests per day and max language models limitations. To compare the accuracy of speech to text, a simple set of 10 words and phrases was defined first.

The table indicates how many of these were correctly recognized. The most accurate services were Google and Yandex.

Overview of The Best Services for Speech to Text

The main disadvantage of the Yandex service in comparison with Google is the limitation of only four available languages. Speech API from Apple has a number of key limitations that do not allow users to consider this service for use with real projects. These limitations include the minimum version of iOS 10 as well as low recognition accuracy compared to similar services from Google and Yandex.

Since native Speech API has only come out relatively recently, most likely in the future we will see an update of this functionality and the expansion of its capabilities. Speech Kit 2 Nuance has a high accuracy when it comes to recognition, and the main problem is the fee charged for the provision of services. After reaching a certain limit of requests, you will then have to pay for the subsequent use of services, even with the basic payment model. The OpenEars framework, whose main advantage is offline work, shows fewer good results in terms of speech recognition accuracy.

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Cloud Speech API Demo

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