1
Daniel N Nikovski, Ajay Divakaran, Regunathan Radhakrishnan, Kadir A Peker: Detecting and diagnosing faults in HVAC equipment. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Clifton D Mueller, Gene V Vinokur, October 28, 2008: US07444251 (68 worldwide citation)

A method and system detects and diagnoses faults in heating, ventilating and air conditioning (HVAC) equipment. Internal state variables of the HVAC equipment are measured under external driving conditions. Expected internal state variables are predicted for the HVAC equipment operating under the ex ...


2
Ajay Divakaran, Ziyou Xiong, Regunathan Radhakrishnan, Kadir A Peker, Koji Miyahara: Method for detecting short term unusual events in videos. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Clifton D Mueller, Gene V Vinokur, February 5, 2008: US07327885 (22 worldwide citation)

A method detects short term, unusual events in a video. First, features are extracted features from the audio and the video portions of the video. Segments of the video are labeled according to the features. A global sliding window is applied to the labeled segments to determine global characteristi ...


3
Kent Bennett Terry, Regunathan Radhakrishnan: Feature optimization and reliability for audio and video signature generation and detection. Dolby Laboratories Licensing Corporation, March 19, 2013: US08400566 (17 worldwide citation)

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 co ...


4
Regunathan Radhakrishnan, Isao Otsuka, Ajay Divakaran: Feature identification of events in multimedia. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Clifton D Mueller, Gene V Vinokur, November 27, 2007: US07302451 (16 worldwide citation)

A method detects events in multimedia. Features are extracted from the multimedia. The features are sampled using a sliding window to obtain samples. A context model is constructed for each sample. The context models form a time series. An affinity matrix is determined from the time series models an ...


5
Ajay Divakaran, Regunathan Radhakrishnan, Kadir A Peker: Method for summarizing a video using motion descriptors. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Andrew J Curtis, September 19, 2006: US07110458 (11 worldwide citation)

A method measures an intensity of motion activity in a compressed video. The intensity of the motion activity is used to partition the video into segments of equal cumulative motion activity. Key-frames are then selected from each segments. The selected key-frames are concatenated in temporal order ...


6
Regunathan Radhakrishnan, Claus Bauer: Media fingerprints that reliably correspond to media content. Dolby Laboratories Licensing Corporation, Hickman Palermo Truong Becker Bingham Wong, Kirk D Wong, January 8, 2013: US08351643 (9 worldwide citation)

Quantized energy values are accessed to initially represent a temporally related group of content elements in a media sequence. The values are accessed over a matrix of regions into which the initial representation is partitioned. The initial representation may be downsampled and/or cropped from the ...


7
Rongshan Yu, Regunathan Radhakrishnan, Robert Andersen, Grant Davidson: Multimode coding of speech-like and non-speech-like signals. Dolby Laboratories Licensing Corporation, March 5, 2013: US08392179 (7 worldwide citation)

The invention relates to the coding of audio signals that may include both speech-like and non-speech-like signal components. It describes methods and apparatus for code excited linear prediction (CELP) audio encoding and decoding that employ linear predictive coding (LPC) synthesis filters controll ...


8
Regunathan Radhakrishnan, Claus Bauer, Kent Bennett Terry, Brian David Link, Hyung Suk Kim, Eric Gsell: Extracting features of video and audio signal content to provide reliable identification of the signals. Dolby Laboratories Licensing Corporation, September 4, 2012: US08259806 (6 worldwide citation)

Signatures that can be used to identify video and audio content are generated from the content by generating measures of dissimilarity between features of corresponding groups of pixels in frames of video content and by generating low-resolution time-frequency representations of audio segments. The ...


9
Ajay Divakaran, Regunathan Radhakrishnan, Michael A Casey: Audio-assisted video segmentation and summarization. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Clifton D Mueller, Gene V Vinokur, March 25, 2008: US07349477 (6 worldwide citation)

A method segments a compressed video by extracting audio and visual features from the compressed video. The audio features are clustered according to K-means clustering in a set of classes, and the compressed video is then partitioned into first segments according to the set of classes. The visual f ...


10
Regunathan Radhakrishnan, Ajay Divakaran: Multimedia event detection and summarization. Mitsubishi Electric Research Laboratories, Dirk Brinkman, Clifton D Muell, Gene V Vinokur, August 5, 2008: US07409407 (5 worldwide citation)

A method detects events in multimedia. Features are extracted from the multimedia. The features are sampled using a sliding window to obtain samples. A context model is constructed for each sample. An affinity matrix is determined from the models and a commutative distance metric between each pair o ...



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