555results about "Differential synchronisation source locking" patented technology

An apparatus and method to synchronize devices in a network to a sub-millisecond timing accuracy. In a first embodiment, the transmission of data is synchronized between a first source device and destination devices communicatively coupled to a network. In a second embodiment, data is deterministically transmitted between a first source device and destination devices communicatively coupled to a network. In a third embodiment, a deterministic network synchronizes the transmission of data between a first source device and destination devices coupled to a network.

Music videos are automatically produced from source audio and video signals. The music video contains edited portions of the video signal synchronized with the audio signal. An embodiment detects transition points in the audio signal and the video signal. The transition points are used to align in time the video and audio signals. The video signal is edited according to its alignment with the audio signal. The resulting edited video signal is merged with the audio signal to form a music video.

The present invention provides an innovative technique for rapidly and accurately determining whether two audio samples match, as well as being immune to various kinds of transformations, such as playback speed variation. The relationship between the two audio samples is characterized by first matching certain fingerprint objects derived from the respective samples. A set (230) of fingerprint objects (231,232), each occurring at a particular location (242), is generated for each audio sample (210). Each location (242) is determined in dependence upon the content of the respective audio sample (210) and each fingerprint object (232) characterizes one or more local features (222) at or near the respective particular location (242). A relative value is next determined for each pair of matched fingerprint objects. A histogram of the relative values is then generated. If a statistically significant peak is found, the two audio samples can be characterized as substantially matching.

Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are particularly useful in applications that bundle audio information with video information. In one technique, gain-control words conveyed with the audio information stream are used to interpolate playback sound levels across a splice. In another technique, special filterbanks or forms of TDAC transforms are used to suppress aliasing artifacts on either side of a splice. In yet another technique, special filterbanks or crossfade window functions are used to optimize the attenuation of spectral splatter created at a splice. In a further technique, audio sample rates are converted according to frame lengths and rates to allow audio information to be bundled with, for example, video information. In yet a further technique, audio blocks are dynamically aligned so that proper synchronization can be maintained across a splice. An example for 48 kHz audio with NTSC video is discussed.

A method and apparatus for capturing image and sound during interactivity with a computer program is provided. The apparatus includes an image capture unit that is configured to capture one or more image frames. Also provided is a sound capture unit. The sound capture unit is configured to identify one or more sound sources. The sound capture unit generates data capable of being analyzed to determine a zone of focus, at which to process sound to the substantial exclusion of sounds outside of the zone of focus. In this manner, sound that is captured and processed for the zone of focus is used for interactivity with the computer program.

There is provided a method for automatically synchronizing playback between a first media service and a second media service both services corresponding to the same media content source. Common audio events in the first media service and the second media service are matched. A playback timing of at least one of the first media service and the second media service is adjusted, based on a result of the matching step, so as to automatically synchronize the playback between the first media service and the second media service.

According to one configuration, a computer environment includes a first monitoring system, a second monitoring system, and an analyzer. The first monitoring system produces video of an item being entered into a point of sale system. The second monitoring system monitors events associated with entering of the item into the point of sale system. The analyzer detects, via a communication from the second monitoring system, an occurrence of at least one event associated with entering of the item. Based on communication, the analyzer correlates the at least one event to a particular time in the video when the at least one event occurred.

A system, method and article of manufacture are provided for creating a synchronizer object in order to playback an event simultaneously on a plurality of a client apparatuses. First, a request is received utilizing a network for viewing an event. Next, the request is queued in memory. In response to the request, an object is created which is adapted to playback the event on a client apparatus simultaneous with the playback of the event on the remaining client apparatuses upon the receipt of an activation signal. The object is sent to one of the client apparatuses utilizing the network for being stored therein.

An audio / video system comprises an audio signal processing path having an audio path delay and a video signal processing path having a video path delay. The audio path delay may be different from the video path delay. The audio path delay and / or the video path delay may change, for example because of replacement of a component within the audio signal processing path or the video signal processing path. Delay matching (synchronization) in the audio / video system comprises adjusting the audio path delay to be substantially equal to the video path delay. Matching the audio path delay to the video path delay generally includes adding delay to the signal processing path with the lesser delay.

Features are extracted from video and audio content that have a known temporal relationship with one another. The extracted features are used to generate video and audio signatures, which are assembled with an indication of the temporal relationship into a synchronization signature construct. the construct may be used to calculate synchronization errors between video and audio content received at a remote destination. Measures of confidence are generated at the remote destination to optimize processing and to provide an indication of reliability of the calculated synchronization error.

An audio / video distribution system and method for providing media to an end-user. The media has an audio component and a video component. At least the audio component is received and played at an end-user device. The system includes a controller, a display device and a synchronization tool. The controller generates a video signal and an audio signal. The display device is coupled to the controller for receiving and displaying the video signal. The synchronization tool is implemented at the end-user device and is configured to allow a user to synchronize playback of the audio signal at the end-user device to the display of the video signal at the display.

Systems and methods create high quality audio-centric, image-centric, and integrated audio-visual summaries by seamlessly integrating image, audio, and text features extracted from input video. Integrated summarization may be employed when strict synchronization of audio and image content is not required. Video programming which requires synchronization of the audio content and the image content may be summarized using either an audio-centric or an image-centric approach. Both a machine learning-based approach and an alternative, heuristics-based approach are disclosed. Numerous probabilistic methods may be employed with the machine learning-based learning approach, such as naïve Bayes, decision tree, neural networks, and maximum entropy. To create an integrated audio-visual summary using the alternative, heuristics-based approach, a maximum-bipartite-matching approach is disclosed by way of example.

A method and an apparatus to synchronize an audio signal and a video signal. The method includes: displaying video on a screen that corresponds to an audio signal including a high frequency component having a predetermined pattern inserted therein to indicate when a scene change occurs in a video signal, detecting a scene change in the displayed video and detecting the high frequency component having the predetermined pattern in the audio signal, calculating a time difference between a time when the scene change is detected in the displayed video and a time when the high frequency component having the predetermined pattern is detected in the audio signal, and controlling delay times of the audio signal and the video signal according to the calculated time difference. Accordingly, the audio signal and the video signal can be automatically synchronized without performing a separate measuring operation.

A method for synchronization of an audio stream and a video stream comprising the steps of (A) determining a first presentation time stamp from the video stream and generating a first handshake signal when the video stream is ready to be transmitted, (B) repeating and dropping one or more audio frames of the audio stream in response to the first handshake signal and a plurality of first predetermined threshold values until a second presentation time stamp from the audio stream matches the first presentation time stamp and generating a second handshake signal when the audio stream is ready to be transmitted and (C) transmitting the video stream and the audio stream in response to the second handshake signal.

An apparatus and a method for synchronization between video and audio in a mobile communication terminal are provided. The method for the synchronization between the video data and the audio data in the mobile communication terminal includes acquiring Presentation Time Stamp (PTS) information for each of audio data and video data which need to be played simultaneously; determining a delay time between the terminal and a wireless device which plays one data of the audio data and the video data; generating new PTS information for the one data by reflecting the determined delay time in the PTS information; and synchronizing the one data and the other data using the new PTS information for the one data and the acquired PTS information for the other data.

Audio video synchronization begins by receiving an audio-video signal via a first communication path. The processing continues by capturing a representation of an audio component of the audio-video signal, wherein the audio component was rendered audible via a second communication path. The processing continues by deriving a reference representation of the audio component of the audio-video signal received via the first communication path. The processing continues by aligning a video component of the audio video-signal of the first communication path with the audio component of the audio video signal of the second communication path based on the representation of the audio component and the reference representation of the audio component.

A baseball game spectating method is composed of input means (score maker system) such as a mobile terminal capable of electronically inputting states of a baseball game successively, the step of successively inputting motions of players and the other information using the input terminal and transmitting their real-time data, filming means for filming the states of the baseball game, the step of encoding and transmitting the states of the baseball game, means for digitizing the input data and recorded image and sound data, a recording medium such as a data server for storing the digitized real-time data therein, a recording medium such as an image server for storing the digitized image therein, a recording medium such as a sound server for storing the digitized sounds therein, a mobile net system such as PDC or / and PHS and gateway and internet for converting protocol, and a mobile terminal such as a cellular phone with high function and high performance.

The present invention provides physicians access to formulary data as well as important clinical and practice management information at the point of care on easy-to-use handheld electronic devices. The invention also provides a method for distributing medical data to medical personnel. The method comprises the steps of storing medical data in a database and periodically communicating selected medical data between the database and an electronic device to establish a medical data distribution system subsidized by sponsoring entities. The invention also provides a computer readable memory storing executable instructions for execution by a computer system such that the computer system functions in a specified manner. The instructions comprise instructions for storing medical data in a database, and instructions for periodically communicating selected medical data between the database and an electronic device to establish a medical data distribution system subsidized by sponsoring entities.

AV content is input and output in an AV system. In the AV system, a plurality of AV devices process a signal of the content to reproduce the content. A source device broadcasts the content to each of the AV devices. In each of the AV devices, a reproduction unit receives the content broadcast by the source device and performs reproduction processing on the received content. A communication unit communicates reproduction processing time information with another AV device, the reproduction processing time information indicating a time required for the reproduction processing of the content. A delay unit delays a time to reproduce the content, such that the delay unit delays reproduction of the content in accordance with an AV device having a latest reproduction timing based on the reproduction processing time information.

A method and apparatus for connecting a plurality of digital video recorders to a plurality of video transmitters via first transmission lines and for connecting the plurality of digital video recorders to a playback receiver via second transmission lines. The playback receiver incorporates an external synchronizing generator for externally synchronizing the plurality of the digital video recorders and the video transmitters. The recorders receiving the video signals generate and inject into the output signals a signal corresponding to identification codes allotted to each video signals. The playback receiver has a selection control circuit receiving selectively and synchronously any individually coded playback or monitored signal, or multiple playback or monitored signals which are displayed individually or in a split screen, respectively. The digital video recorder includes a time-date signal generator and a processing circuit compressing the video signals and outputting them with an injected identification code and time and date of the recorded signals and storing the signal into at least one memory device in an endless rotation, wherein freshly stored signals replace the oldest stored signals.

A digital receiver contains a local video clock that controls the video presentation speed and a local audio clock that controls the audio presentation speed separately and independently of the video presentation speed. To control the video presentation speed, a comparator compares a program clock reference in a video packet with a local time. A video clock controller then speeds up or slows down the video clock as needed to be back on schedule. To control the audio presentation speed, a comparator compares a program clock reference in an audio packet with the local time. An audio clock controller then speeds up or slows down the audio clock as needed to be back on schedule.

An event as defined by a place and a time may be captured by multiple devices or individuals. Storing time information in association with the content item allows users to identify content associated with that event or any event. Time data may be provided in varying time bases depending on the network from which time information is determined. Accordingly, all content capturing the same event may be synchronized and aligned appropriately by adjusting the various timing information to a common time base. The synchronization and alignment is facilitated by capturing content using very fine time bases that provides accurate time stamping of content. In one or more arrangements, timing information may be adjusted using a time almanac that uses sample timing data. The content may further be assembled into a content item that provides multiple perspectives of the same event.

To provide an audio-video data synchronization method whereby an increase in the amount of control message transmission can be suppressed and the video output can be prevented from being interrupted. The audio-video data synchronization method includes: obtaining, by the audio output device, a first latency that is a period of time taken for the video output device to output the video, by receiving the display identification data that includes information indicating the first latency from the video output device when the indication of the connection validity status information changes from Invalid to Valid; adjusting, by the audio output device, timing of outputting the audio according to the first latency; obtaining, by the video output device, a second latency which is a period of time taken to output the video in the outputting; notifying the audio output device of the second latency by sending a control message from the video output device when the connection validity status information indicates Valid, the control message including information that indicates the second latency obtained in the obtaining of a second latency; and adjusting, by the audio output device, timing of outputting the audio according to the second latency.