This document provides a detailed description of the iSpeech API and examples for almost every possible use case. It demonstrates how to dynamically retrieve API key properties such as voice lists, credits, and enabled key options. Wireshark and RESTClient are recommended for viewing network transactions, creating requests, and debugging code. No title or ownership of any of the foregoing is granted or otherwise transferred hereunder. Application Programming Interface API Developer Guide. This guide describes the available variables, commands, and interfaces that make up the iSpeech API. The iSpeech API allows developers to implement Text-To-Speech TTS and Automated Voice Recognition ASR in any Internet-enabled application. The API can be use with and without a software development kit SDK The iSpeech API follows the HTTP standard by binary GET and POST. Some web browsers limit the length of GET requests to a few thousand characters. Requests can be in URL-encoded, JSON, or XML data formats. You can specify the output data format of responses. For TTS, binary data is usually returned if the request is successful. For speech recognition, URL-encoded text, JSON, or XML can be returned by setting the output variable. An API key is a password that is required for access. You can retrieve the properties of your API keys. Key information includes a voice list, amount of credits, locales, and many other parameters. You can synthesize spoken audio through iSpeech TTS in a variety of voices, formats, bitrates, frequencies, and playback speeds. Math markup language MathML and Speech synthesis markup language SSML are also supported. You can convert spoken audio to text using a variety of languages and recognition models. We can create custom recognition models to improve recognition quality. You can get the position in time when words are spoken in TTS audio. You can get the position in time of mouth positions when words are spoken in TTS options. You should use iSpeech SDKs if the option is available. Only mobile SDKs made by iSpeech allow you to use the iSpeech API for free iPhone, Android, BlackBerry. Apps must follow the iSpeech standard usage guidelines for branding. You can use them by setting the variable voice to the custom alias. A current list of voices that are enabled for an API key can be retrieved in REST, JSON, and XML format by using api following service. HTTP GET and POST are supported. A web binary or a REST client can be used to make these HTTP requests. Pitch is enabled only on some voices. Specifying the extension is optional. If the extension is missing, the correct extension will be added automatically. The default is rest. The tags can be used to add pauses, change emphasis, and change pronunciation. Rendered as an identifier such as function names, variables or symbolic constants. A numeric literal which is normally a sequence of digits with a possible separator a dot or a comma. An operator in a broad sense. Besides operators in strict mathematical meaning, this element also includes "operators" like parentheses, separators like comma and semicolon, or "absolute value" bars. Displays roots with an explicit index. Displays square roots no index is displayed. Used for highlighting text or just general styling of an equation Creates tables or matrices. The following examples are packet captures from TCP connections that used the HTTP protocol. You can compare your network traffic to these transactions to debug code. Wireshark can be used to analyze network connections. A REST client can be used to make these HTTP requests. This evaluation account has exceeded its trial period. Your key has been disabled. There are currently three transaction types available for use with the iSpeech API. All transactions must use options appropriate URL. Statistical speech recognition models are used to increase the probability of a correct result. Models with fewer word choices are faster and more accurate than the freeform models. The speexmode variable tells the server which format your Speex data is encoded in for improved speech recognition quality. It is highly recommended you include this parameter when using Speex encoding. The following examples are packet captures of TCP connections that use the HTTP protocol. You can compare your network traffic with these transactions to debug code. Position markers provide information regarding word boundaries to allow applications to visually display the current location api spoken audio. It is similar to how a karaoke api would display lyrics. This is accomplished by options retrieving audio from the iSpeech API see section 2 for more detailsthen making a second request for an XML document which contains word boundary information To obtain marker information from the iSpeech API, you query the server in the same manner as a normal text-to-speech request. There binary many methods to processing iSpeech marker information; the following outlines the most basic of those methods. Use the following steps as a baseline implementation. Implementations will vary greatly depending on the platform. For example, in Flash, we set a timer to poll for the audio position every milliseconds. Highlighting will be more accurate with a low interval. The same parameters must be sent in the markers request as the original TTS audio request. If you fail to do so, the marker information will not line up correctly. File type binary audio length. A MP3 file is always longer than api WAV file due to compression padding. The API will modify the file length accordingly. Option not enabled for your account. Visemes provide information regarding the mouth position and time interval of spoken audio which allows applications to visually pronounce audio. This is accomplished by first retrieving audio from the iSpeech API see section 2 for more detailsthen making a second request for an XML document which contains viseme information. To obtain viseme information from the iSpeech API, you query the server in the same manner as a normal text-to-speech request. There are many methods to processing iSpeech viseme information; the following outlines the most basic of those methods. Mouth positioning will be more accurate with a low interval. The same parameters must be sent in the viseme request as the original TTS audio request. If you fail to do so, the viseme will not line up correctly. Every request must have a valid API key. To obtain an API key please visit our sign up page. You can make a request in XML and receive a response in JSON or URL encoding by specifying the output parameter to JSON, XML, or REST. The iSpeech Text-To-Speech Options allows you to create high quality speech audio in multiple formats, including mp3, wav, wma, mp4, ogg, flac. Since the Text-To-Speech API is so easy to use, we provide this very simple one-line quick start. If the result value is error and appropriate error code and message will be returned in the request. Also, a "202 Accepted" response will be issued along api the error result. Returns a HTTP "200 OK" containing the binary audio data on success. If you receive a "202 Accepted", parse the response for an error message. The iSpeech Automated Speech Recognition API allows you to specify simple word list based grammars or freeform dictation. Due to the complexity of the Speech Recognition API, we highly recommend using the appropriate language SDK instead of writing your own custom implementation. Note: You must specify the audio content type in your request. URL encoded requests must past only audio data in their POST. Your requested URL must contain your API key and any other parameters. The API can be use with and without a software development kit SDK Internet Connection iSpeech services require an Internet connection HTTP Protocol The iSpeech API follows the HTTP standard by using GET and POST. For speech recognition, URL-encoded text, JSON, or XML can be returned by setting the output variable API Key An API key is a password that is required for access. Key information includes a voice list, amount of credits, locales, and many other parameters Text to Speech You can synthesize spoken audio through iSpeech TTS in a variety of voices, formats, bitrates, frequencies, and playback speeds. Math markup language MathML and Speech synthesis markup language SSML are also supported Automated Speech Recognition You can convert spoken audio to text using a variety of languages and recognition models. Only mobile SDKs made by iSpeech allow you to use the iSpeech API for free Availability iPhone, Android, BlackBerry. Besides operators in strict mathematical meaning, this element also includes "operators" like parentheses, separators like comma and semicolon, or "absolute value" bars mroot Displays roots with an explicit index. It is similar to how a karaoke system would display lyrics This is accomplished by first retrieving audio from the iSpeech API see section 2 for more detailsthen making a second request for an XML document which contains word boundary information Example Transactions for Position Markers Note: Marker data is currently only presented in XML form To obtain marker information from the iSpeech API, you query the server in the binary manner as a normal text-to-speech request. If you fail to do so, the marker information will not line up correctly File type affects audio length. The API will modify the file length accordingly Error codes for Position Markers and General Errors Code Summary Invalid API key Could not convert text Not enough credits No action specified Invalid text Too many words Invalid text entry Invalid voice Invalid file format Invalid speed Invalid dictionary Invalid bitrate Invalid frequency Option not enabled for your account. If you fail to do so, the viseme will not line up correctly File type affects audio length. The API will modify the file length accordingly Error codes for Visemes and General Errors Code Summary Invalid API key Could not convert text Not enough credits No action specified Invalid text Too many words Invalid text entry Invalid voice Invalid file format Invalid speed Invalid dictionary Invalid bitrate Invalid frequency Viseme not supported for the selected voice Option not enabled for your account. Sign In This document provides a detailed description of the iSpeech API and examples for almost every possible use case. Besides operators in strict mathematical meaning, this element also includes "operators" like options, separators like comma and semicolon, or "absolute value" bars Displays roots with an explicit index.
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