Cisco Technology, Inc.

Babblelabs LLC

Marcin Ciolek

Samer Lutfi Hijazi

Raul Alejandro Casas

Christopher Rowen

Hua Mu

Mihailo Kolundzija

Michal Sulewski

Dror E Maydan

Erik S Panu

Dror Maydan

Erik Panu

A method comprises: vector quantizing input vectors representative of audio into an original sequence including indices of codewords of a codebook; generating candidate sequences including the indices of the codewords of the codebook by evaluating, for each candidate sequence, transition costs for transitions between the indices based on (i) transition probabilities of the transitions, and (ii) distances between the codewords represented by the indices and the input vectors that corresponds to the indices; determining a preferred candidate sequence of the candidate sequences to replace the original sequence based on the transition costs for each candidate sequence; and transmitting the preferred candidate sequence in place of the original sequence.

Vector quantizer correction for audio codec system

A method comprises: storing n dimension (nD) dictionaries (nD dictionaries) where n decreases from a highest dimension to a lowest dimension, each nD dictionary including codewords for sequences of n symbols that are of a limited number that is less than all possible sequences of n symbols; storing key blocks for corresponding ones of the nD dictionaries, each key block configured with keys that map sequences of n−1 symbols to dictionaries of a corresponding one of the nD dictionaries that includes the codewords; receiving a sequence of symbols that represent indices of codevectors of a vector quantizer codebook that are representative of audio; determining a codeword using the key blocks and the nD dictionaries; and encoding a current symbol of the sequence of symbols using the codeword.

Reduced multidimensional indices compression for audio codec system

Systems and methods are disclosed for audio group identification for conferencing. For example, methods may include joining a conference call using a network interface; accessing an audio signal that has been captured using a microphone; detecting a control signal in the audio signal; and, responsive to detection of the control signal, invoking modification of an audio path of the conference call.

Audio group identification for conferencing

Growing community of inventors

Gdansk, Poland

Marcin Ciolek