Our innovations in voice, natural language understanding, reasoning and systems integration come together to create more human technology.Learn more. Quickly extract insights from videos using the artificial intelligence of Video Indexer.Detect words, identify faces and emotions, and build workflows.Speech-SDK_1.png' alt='Speech To Text Using Microsoft Speech Sdk Windows' title='Speech To Text Using Microsoft Speech Sdk Windows' />Microsoft Speech Recognition Web.Socket Protocol. Microsofts Speech Service is a cloud based platform that features the most advanced algorithms available for converting spoken audio to text.The Microsoft Speech Service protocol defines the connection setup between client applications and the service, the speech recognition messages exchanged between counterparts client originated Messages and service originated messages.In addition, telemetry messages and error handling are described.Connection establishment.The Microsoft Speech Protocol follows the Web.Socket standard specification IETF RFC 6.A Web. Socket connection starts out as an HTTP request that contains HTTP headers indicating the clients desire to upgrade the connection to a Web.Socket instead of using HTTP semantics the server indicates its willingness to participate in the Web.Socket connection by returning an HTTP 1.Switching Protocols response.After the exchange of this handshake, both client and service keep the socket open and begin using a message based protocol to send and receive information.To begin the Web.Socket handshake, the client application sends an HTTPS GET request to the service and includes standard Web.Socket upgrade headers along with other headers that are specific to speech.GET speechrecognitioninteractivecognitiveservicesv.HTTP1. 1. Host speech.Upgrade websocket.Connection Upgrade.Proto. Sec Web. Socket Key w.PEE5. Fzw. R6mxpssly.RRpg. P. Sec Web.Socket Version 1.Authorization tEw.CIAg. ALBAAUWkzi.SCJKS1. Vkhug. Degv.L0e. AAJq. BYKKTzp.PZOe. Gk. 7Rf. Zmd.Bh. YY2. 8jl p. X Connection.Id A1. CAF9. 2F7.FA4. 1C7. 2C7. B5.Origin https speech.The service responds with.HTTP1. 1 1. 01 Switching Protocols.Upgrade websocket.Connection upgrade.Sec Web. Socket Key 2.PTTXbee. BXlrr. UNs.Y1. 5n. 01dPcc. Set Cookie Speech.Service. TokenAAAAABAAWTC8ncb.COL expiresWed, 1.Aug 2. 01. 6 1. 5 3.GMT domainbing. Date Wed, 1.Aug 2. GMT. All speech requests require the TLS encryption the use of unencrypted speech requests is not supported.The following TLS versions are supported Connection identifier.The Microsoft Speech Service requires that all clients include a unique ID to identify the connection.Clients must include the X Connection.Id header when starting a Web.Socket handshake.The X Connection.Id header must be a UUIDuniversally unique identifier value.Web. Socket upgrade requests that do not include the X Connection.Id, that do not specify a value for the X Connection.Id header, or that do not include a valid UUID value are rejected by the service with an HTTP 4.Bad Request response.Authorization. In addition to the standard Web.Socket handshake headers, speech requests require an Authorization header.Connection requests without this header are rejected by the service with an HTTP 4.Forbidden response.The Authorization header must contain a JSON Web Token JWT access token.For information about subscribing and obtaining API keys that are used to retrieve valid JWT access tokens, see Cognitive Services Subscription.The API key is passed to the token service.For example POST https api.Token. Content Length 0.The required header information for token access is as follows.Name. Format. Description.Ocp Apim Subscription Key.ASCIIYour subscription key.The token service returns the JWT access token as textplain.Then the JWT is passed as a Base.Bearer. For example Authorization Bearer Base.Cookies. Clients must support HTTP cookies as specified in RFC 6.HTTP redirection.Clients must support the standard redirection mechanisms specified by the HTTP protocol specification.Speech endpoints.Clients must use an appropriate endpoint of the Microsoft Speech Service.The endpoint is based on recognition mode and language.Some examples are shown in the table below.For more information, see the Service URI page.Reporting connection errors.Clients should report all problems and errors encountered while making a connection immediately.The message protocol for reporting the failed connections is described in the Connection Failure Telemetry.Connection duration limitations.When compared with typical web service HTTP connections, Web.Socket connections last a long time.The Microsoft Speech Service does, however, place limitations on the duration of the Web.Socket connections to the service.The maximum duration for any active Web.Socket connection is 1.A connection is active if either the service or the client is sending Web.Socket messages over that connection.The service terminates the connection without warning once the limit has been reached.Clients should develop user scenarios that do not require the connection to remain active at or near the maximum connection lifetime.The maximum duration for any inactive Web.Socket connection is 1.A connection is inactive if neither the service nor the client has sent any Web.Socket message over the connection.The service terminates the inactive Web.Socket connection after the maximum inactive lifetime is reached.Message types. Once a Web.Socket connection is established between the client and the service, both the client and the service may begin sending messages.This section describes the format of these Web.Socket messages. IETF RFC 6.Web. Socket messages can transmit data using either a text or a binary encoding.The two encodings use different on the wire formats.Each format is optimized for efficient encoding, transmission, and decoding of the message payload.Text Web. Socket messages.Text Web. Socket messages carry a payload of textual information consisting of a section of headers and a body separated by the familiar double carriage return newline pair used for HTTP messages.And, like HTTP messages, text Web.Socket messages specify headers in name value format separated by a single carriage return newline pair.Any text included in a text Web.Socket message must use UTF 8 encoding.Text Web. Socket messages must specify a message path in the header Path.The value of this header must be one of.Binary Web. Socket messages.Binary Web. Socket messages carry a binary payload.In the Microsoft Speech Service protocol, audio is transmitted to and received from the service using binary Web.Socket messages all other messages are text Web.Socket messages. Like text Web.Socket messages, binary Web.Socket messages consist of a header and a body section.The first 2 bytes of the binary Web.Socket message specify, in big endian order, the 1.The minimum header section size is 0 bytes the maximum size is 8.The text in the headers of binary Web.Socket messages must use US ASCII encoding.Headers in a binary Web.Socket message are encoded in the same format as in text Web.Socket messages, in name value format separated by a single carriage return newline pair.Binary Web. Socket messages must specify a message path in the header Path.The value of this header must be one of the speech protocol message types defined later in this document.Both text and binary Web.Socket messages are used in the Microsoft speech protocol.Client originated messages.Both the client and the service may start to send messages after the connection has been established.This section describes the format and payload of messages that client applications send to the Microsoft Speech Service.The section Service Originated Message presents the messages that originate in the Microsoft Speech Service and are sent to the client applications.The main messages sent by the client to the services are speech.Before looking into each message in detail, the common required message headers for all these messages are described.The following headers are required for all client originated messages.Header. Value. Path.The message path as specified in this document.X Request. Id. UUID in no dash format.X Timestamp. Client UTC clock timestamp in ISO 8.Client originated requests are uniquely identified by the X Request.Id message header this header is required for all client originated messages.The X Request. Id header value must be a UUID in no dash form, for example as 1.Requests without an X Request.Id header or with a header value that uses the wrong format for UUIDs cause the service to terminate the Web.Socket connection.Each message sent to the Microsoft Speech Service by a client application must include an X Timestamp header.Windows Speech Recognition Wikipedia.Windows Speech Recognition is a speech recognition component developed by Microsoft and introduced in the Windows Vistaoperating system that enables the use of voice commands to perform operations, such as the dictation of text, within applications and the operating system itself.Speech recognition relies on the Speech API developed by Microsoft,2 and is also present in Windows 7,3Windows 8,4Windows 8.Windows 1. 0. 5HistoryeditPrecursorseditMicrosoft has been involved in speech recognition and speech synthesis research for many years.In 1. 99. 3, Microsoft hired Xuedong Huang from Carnegie Mellon University to lead its speech development efforts.The companys research eventually ultimately led to the development of the Speech API, introduced in 1.Speech recognition technology has been used in some of Microsofts products prior to Windows Speech Recognition.Versions of Microsoft Office, including Office XP and Office 2.Office applications and other applications such as Internet Explorer.Installation of Office would enable limited speech functionality in Windows NT 4.Windows 9. 8 and Windows ME.The 2. Windows XP Tablet PC Edition would also include support within the Tablet PC Input Panel feature,89 and the Microsoft PlusWindows XP expansion package enabled voice commands to be used in Windows Media Player.However, this support was limited to individual applications, and prior to Windows Vista, the Windows operating system did not include integrated support for speech recognition.DevelopmenteditAt the Windows Hardware Engineering Conference of 2.Microsoft announced that Windows Vista, then known by its codename Longhorn, would include advances in speech recognition technology and features such as support for microphone arrays.Bill Gates expanded upon this information during the Professional Developers Conference of 2.Longhorn, in both recognition and synthesis, real time.Further reports said that the operating system would include integrated support for speech recognition,1.In 2. 00. 3, Microsoft clarified the extent of its intended integration for Windows Vista when the company stated within a pre release software development kit that the common speech scenarios, like speech enabling menus and buttons, will be enabled system wide in the operating system.During Win. HEC 2.Microsoft listed speech recognition as part of its Longhorn mobile PC strategy to improve productivity and listed microphone arrays as a hardware opportunity for the operating system.At Win. HEC 2. 00.Microsoft released additional details pertaining to speech recognition in Windows Vista with a focus on accessibility, new mobility scenarios, and improvements to the speech user experience.Unlike the speech support included in Windows XP, which was integrated with the Tablet PC Input Panel and required switching between dictation and command modes, Windows Vista would separate the feature from the Tablet PC Input Panel by introducing a dedicated interface for speech input on the desktop and would also unify the previously separate dictation and command modes.In previous versions of Windows, speech recognition would not allow a user to speak a command after dictation or vice versa without first switching between these two modes.Microsoft also stated that speech recognition in Windows Vista would improve dictation accuracy, and support additional languages and microphone arrays.A demonstration of the feature at Win.HEC 2. 00. 5 focused on e mail dictation with correction and editing commands,2.Windows Vista Beta 1 would include an integrated speech recognition application.In an effort to persuade company employees to interact with Windows Speech Recognition during its development, Microsoft offered an opportunity to win a Premium model of its Xbox 3.On July 2. 7, 2. 00.RTM, a notable incident pertaining to speech recognition occurred during a demonstration by Microsoft at its annual Financial Analyst Meeting.Speech recognition initially failed to function correctly, which resulted in an unintended output of Dear aunt, lets set so double the killer delete select all when several attempts to dictate led to consecutive output errors 2.Microsoft later revealed that the errors during the demonstration were due to an audio gainglitch that caused speech recognition to distort the dictated commands.The glitch was fixed prior to the operating systems release to manufacturing on November 8, 2.Security reporteditReports surfaced in early 2.Windows Speech Recognition may be vulnerable to an attack that could allow attackers to take advantage of its capabilities to perform undesired operations on a targeted computer by playing audio through the targeted computers speakers 3.While Microsoft stated that such an attack is theoretically possible, it would have to meet a number of prerequisites in order to be successful the targeted system would be required to have the speech recognition feature previously activated and configured, speakers and microphones connected to the targeted system would need to be turned on, and the exploit would require the software to interpret commands without a user noticingan unlikely scenario as the affected system would perform user interface operations and produce audible feedback as speakers would need to be active.Moreover, mitigating factors would include dictation clarity, and microphone feedback and placement.An exploit of this nature would also not be able to perform privileged operations for users or protected administrators without explicit user consent because of User Account Control.Overview and featureseditWindows Speech Recognition allows a user to control a computer, including the operating system desktopuser interface, through voice commands.Applications, including most of those bundled with Windows, can also be controlled through voice commands.By using speech recognition, users can dictate text within documents and e mail messages, fill out forms, control the operating system user interface, perform keyboard shortcuts, and move the mouse cursor.Speech recognition uses a speech profile to store information about a users voice. Download Game Vietnam Air War . Accuracy of speech recognition increases through use, which helps the feature adapt to a users grammar, speech patterns, vocabulary, and word usage.Speech recognition also includes a tutorial to improve accuracy,1 and can optionally review a users personal documents, including e mail messages, to improve its command and dictation accuracy.In Windows 7 and later versions, an additional option is available that allows users to send speech information to Microsoft.Individual speech profiles can be created on a per user basis,3.Windows Easy Transfer4.Microsoft. 4. 1 Profiles archived through this utility carry the WSRPROFILE filename extension.Windows Speech Recognition relies on Microsoft Speech API.Text Services Framework.Speech Recognition currently supports the following languages Chinese Traditional, Chinese Simplified, English U.S., English U. K., French, German, Japanese, and Spanish.InterfaceeditThe interface for Windows Speech Recognition primarily consists of a status area for instructions, for information about commands e.The status area represents the current state of Windows Speech Recognition in a total of three modes, listed below with their respective meanings Listening The speech recognizer is active and waiting for user input.Sleeping The speech recognizer will not listen for or respond to commands other than Start listeningOff The speech recognizer will not listen or respond to any commands this mode can be enabled by speaking Stop listeningIn addition to the three modes listed above, the status area can also display information about messages that users can customize as part of their own Windows Speech Recognition Macros.Alternates paneledit.The alternates panel in Windows Speech Recognition displaying suggestions for a phrase.
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