Abstract: A system configured to vary a speech speed of speech represented in input audio data without changing a pitch of the speech. The system may vary the speech speed based on a number of different inputs, including non-audio data, data associated with a command, or data associated with the voice message itself. The non-audio data may correspond to information about an account, device or user, such as user preferences, calendar entries, location information, etc. The system may analyze audio data associated with the command to determine command speech speed, identity of person listening, etc. The system may analyze the input audio data to determine a message speech speed, background noise level, identity of the person speaking, etc. Using all of these inputs, the system may dynamically determine a target speech speed and may generate output audio data having the target speech speed.

Abstract: Methods and devices for causing a communications session between a first device and a second device to end based on lack of speech activity are described herein. In some embodiments, non-speech may be detected for both the first device and the second device. If the non-speech associated with the first device is determined to occur at a substantially same time as the non-speech associated with the second device, then this may indicate that no individuals are talking within earshot of their respective devices. Furthermore, the non-speech detected by the first device and the non-speech detected by the second device may both be of an amount of time that is greater than a predefined temporal threshold. If so, then the communications session may be caused to end because speech activity has not been detected by either device for more than the predefined temporal threshold.

Abstract: Systems and methods for extracting contact information from a message are described. A system can receive a message for a recipient, where the message originates from a message source having a first contact identifier (i.e., phone number, text address, etc.). The system can determine text data associated with the content of that message and process the text data to determine that the message refers to a second contact identifier that is different from the first contact identifier. The system may output the message to a recipient device (such as using text-to-speech, etc.) and may store an association between the message source and the second contact identifier. When the recipient speaks a command to reply to the first message or contact the message source, the system may determine the reply is intended for the message source and may route the reply using the second contact identifier included in the first message.

Abstract: A system configured to vary a speech speed of speech represented in input audio data without changing a pitch of the speech. The system may vary the speech speed based on a number of different inputs, including non-audio data, data associated with a command, or data associated with the voice message itself. The non-audio data may correspond to information about an account, device or user, such as user preferences, calendar entries, location information, etc. The system may analyze audio data associated with the command to determine command speech speed, identity of person listening, etc. The system may analyze the input audio data to determine a message speech speed, background noise level, identity of the person speaking, etc. Using all of these inputs, the system may dynamically determine a target speech speed and may generate output audio data having the target speech speed.

Abstract: Methods and devices for causing a communications session between a first device and a second device to end based on lack of speech activity are described herein. In some embodiments, a communications between a first device and a second device may be initiated by the first device, where a first user account associated with the first device is authorized to initiate communications session with the second device by a second user account. After the communications session is started, audio data is received by a speech activity detection system, which determines whether the audio data represents speech or non-speech. If, after the communications session begins, non-speech is detected by the first device for more than a predefined amount of time, then the communications session is caused to end so that the first device is not capable of receiving video and/or audio associated with the second device.

Abstract: This disclosure describes techniques for providing lighting indications in speech-based systems. For instance, a remote system may receive, from a conferencing system, a first message indicating that a first electronic device is participating in a conference call with at least a second electronic device and a third electronic device. The remote system can then associate the second electronic device with a first visual indication, and then cause the first electronic device to display the first visual indication. The remote system can further associate the third electronic device with a second visual indication, and then cause the first electronic device to display the second visual indication. Additionally, the remote system may receive a second message indicating that the first electronic device disconnected from the conference call and, in response, cause the first electronic device to cease from displaying the first visual indication and the second visual indication.

Abstract: Systems, methods, and devices for escalating voice-based interactions via speech-controlled devices are described. Speech-controlled devices capture audio, including wakeword portions and payload portions, for sending to a server to relay messages between speech-controlled devices. In response to determining the occurrence of an escalation event, such as repeated messages between the same two devices, the system may automatically change a mode of a speech-controlled device, such as no longer requiring a wakeword, no longer requiring an indication of a desired recipient, or automatically connecting two speech-controlled devices in a voice-chat mode. In response to determining the occurrence of further escalation events, the system may initiate a real-time call between the speech-controlled devices.

Abstract: The present invention relates to novel spiro-oxazine analogs of Formula-I and Indolinone compounds of Formula-II or positional isomers, or stereoisomers, or derivatives, or pharmaceutically acceptable salt thereof. Formula-I Formula-II Further the invention provides transition-metal free multicomponent reaction (MCR) process for the preparation of said compounds of Formula-I and II using aryne precursor, N-substituted isatin and N-heteroaromatic compound as the nucleophile, under mild condition leading to formation of desired complex of spiro-oxazine analogs (I) and indolinone analogs (II) in high yield and selectivity.

Abstract: Systems, methods, and devices for outputting indications regarding voice-based interactions are described. A first speech-controlled device detects spoken audio corresponding to recipient information. The first device captures the audio and sends audio data corresponding to the captured audio to a server. The server determines a second speech-controlled device of the recipient and sends a signal to the recipient's second speech-controlled device representing a message is forthcoming. The recipient's second speech-controlled device outputs and indication representing a message is forthcoming.

Abstract: Systems, methods, and devices for escalating voice-based interactions via speech-controlled devices are described. Speech-controlled devices capture audio, including wakeword portions and payload portions, for sending to a server to relay messages between speech-controlled devices. In response to determining the occurrence of an escalation event, such as repeated messages between the same two devices, the system may automatically change a mode of a speech-controlled device, such as no longer requiring a wakeword, no longer requiring an indication of a desired recipient, or automatically connecting two speech-controlled devices in a voice-chat mode. In response to determining the occurrence of further escalation events, the system may initiate a real-time call between the speech-controlled devices.

Abstract: Systems, methods, and devices for outputting visual indications regarding voice-based interactions are described. A first speech-controlled device detects spoken audio corresponding to a voice message to a second speech-controlled device. The first device captures the audio and sends audio data corresponding to the captured audio to a server. The server performs speech processing on the audio data to determine a recipient and message content. The server then determines a second speech-controlled device associated with the recipient and sends the message content to the recipient's second speech-controlled device. Thereafter, the server receives an indication from the recipient's speech-controlled device that the second device is detecting speech, presumably in response to the original message. The server then causes a visual indication to be output by the first speech-controlled device, with the visual indication representing the recipient-speech controlled device is detecting speech.

Abstract: The present invention discloses oxindole compounds and a single step, one pot reaction for the synthesis of oxindole derivates via a solvent free Passerini reaction of isocyanides, isatins and carboxylic acids.

Abstract: The present invention relates to novel spiro-oxazine analogues of Formula-I and Indolinone compounds of Formula-II or positional isomers, or stereoisomers, or derivatives, or pharmaceutically acceptable salt thereof. Formula-I Formula-II Further the invention provides transition-metal free multicomponent reaction (MCR) process for the preparation of said compounds of Formula-I and II using aryne precursor, N-substituted isatin and N-heteroaromatic compound as the nucleophile, under mild condition leading to formation of desired complex of spiro-oxazine analogues (I) and indolinone analogues (II) in high yield and selectivity.

Abstract: The present invention relates to novel spiro-oxazine analogues of Formula-I and Indolinone compounds of Formula-II or positional isomers, or stereoisomers, or derivatives, or pharmaceutically acceptable salt thereof. Formula-I Formula-II Further the invention provides transition-metal free multicomponent reaction (MCR) process for the preparation of said compounds of Formula-I and II using aryne precursor, N-substituted isatin and N-heteroaromatic compound as the nucleophile, under mild condition leading to formation of desired complex of spiro-oxazine analogues (I) and indolinone analogues (II) in high yield and selectivity.

Abstract: The present invention relates to novel spiro-oxazine analogues of Formula-I and Indolinone compounds of Formula-II or positional isomers, or stereoisomers, or derivatives, or pharmaceutically acceptable salt thereof. Formula-I Formula-II Further the invention provides transition-metal free multicomponent reaction (MCR) process for the preparation of said compounds of Formula-I and II using aryne precursor, N-substituted isatin and N-heteroaromatic compound as the nucleophile, under mild condition leading to formation of desired complex of spiro-oxazine analogues (I) and indolinone analogues (II) in high yield and selectivity.

Abstract: The present invention discloses oxindole compounds and a single step, one pot reaction for the synthesis of oxindole derivates via a solvent free Passerini reaction of isocyanides, isatins and carboxylic acids.