Thomson Licensing

Dolby International Ab

Dolby Laboratories Licensing Corporation

Holger Kropp

Stefan Abeling

Meinolf Blawat

Sven Kordon

Johannes Boehm

Florian Keiler

Herbert Schuetze

Alexander Krueger

Johann-Markus Batke

Jens Spille

Xiaoming Chen

Malte Borsum

Kai Dorau

The encoding and decoding of HOA signals using Singular Value Decomposition includes forming based on sound source direction values and an Ambisonics order corresponding ket vectors (|Y(&#x3a9;)) of spherical harmonics and an encoder mode matrix (&#x39e;). From the audio input signal (|x(&#x3a9;)) a singular threshold value (&#x3c3;) determined. On the encoder mode matrix a Singular Value Decomposition is carried out in order to get related singular values which are compared with the threshold value, leading to a final encoder mode matrix rank (r). Based on direction values (&#x3a9;) of loudspeakers and a decoder Ambisonics order (N), corresponding ket vectors (|Y(&#x3a9;)) and a decoder mode matrix (&#x3a8;) are formed. On the decoder mode matrix a Singular Value Decomposition is carried out, providing a final decoder mode matrix rank (r). From the final encoder and decoder mode matrix ranks a final mode matrix rank is determined, and from this final mode matrix rank and the encoder side Singular Value Decomposition an adjoint pseudo inverse (&#x39e;)of the encoder mode matrix (&#x39e;) and an Ambisonics ket vector (|a') are calculated. The number of components of the Ambisonics ket vector is reduced according to the final mode matrix rank so as to provide an adapted Ambisonics ket vector (|a&#x2032;). From the adapted Ambisonics ket vector, the output values of the decoder side Singular Value Decomposition and the final mode matrix rank an adjoint decoder mode matrix (&#x3a8;)is calculated, resulting in a ket vector (|y(&#x3a9;)) of output signals for all loudspeakers.

Methods and apparatus for higher order ambisonics decoding based on vectors describing spherical harmonics

Currently there is no simple and satisfying way to create 3D audio from existing 2D content. The conversion from 2D to 3D sound should spatially redistribute the sound from existing channels. From a multi-channel 2D audio input signal (x(t)) a 3D sound representation is generated which includes an HOA representation Formula (I) and channel object signals Formula (II) scaled from channels of the 2D audio input signal. Additional signals Formula (III) placed in the 3D space are generated by scaling (; Formula (IV)) channels from the 2D audio input signal and by decorrelating (; Formula (V)) a scaled version of a mix of channels from the 2D audio input signal, whereby spatial positions for the additional signals are predetermined. The additional signals Formula (III) are converted () to a HOA representation Formula (I).

Method and apparatus for generating from a multi-channel 2D audio input signal a 3D sound representation signal

Method and apparatus for higher order ambisonics encoding and decoding using singular value decomposition

The encoding and decoding of HOA signals using Singular Value Decomposition includes forming () based on sound source direction values and an Ambisonics order corresponding ket vectors (|Y(&#x3a9;5))) of spherical harmonics and an encoder mode matrix (&#x39e;). From the audio input signal (|&#x3c7;(&#x3a9;))) a singular threshold value (&#x3c3;) determined. On the encoder mode matrix a Singular Value Decomposition () is carried out in order to get related singular values which are compared with the threshold value, leading to a final encoder mode matrix rank (fin). Based on direction values (&#x3a9;) of loudspeakers and a decoder Ambisonics order (N), corresponding ket vectors (IY(&#x3a9;)) and a decoder mode matrix (&#x3a8;) are formed (). On the decoder mode matrix a Singular Value Decomposition () is carried out, providing a final decoder mode matrix rank (fin). From the final encoder and decoder mode matrix ranks a final mode matrix rank is determined, and from this final mode matrix rank and the encoder side Singular Value Decomposition an adjoint pseudo inverse (&#x39e;)of the encoder mode matrix (&#x39e;) and an Ambisonics ket vector (Ia') are calculated. The number of components of the Ambisonics ket vector is reduced () according to the final mode matrix rank so as to provide an adapted Ambisonics ket vector (|a&#x2032;). From the adapted Ambisonics ket vector, the output values of the decoder side Singular Value Decomposition and the final mode matrix rank an adjoint decoder mode matrix (&#x3a8;)is calculated (), resulting in a ket vector (|y(&#x3a9;)) of output signals for all loudspeakers.

An optical microphone comprises a light source configured to emit a light beam and an acoustic sensor configured to reflect the light beam. The acoustic sensor includes single-wall nanotubes and deflects in response to pressure waves. An optional reflector of the optical microphone is configured to re-reflect the light beam from the acoustic sensor. A detector is configured to detect the light beam from the acoustic sensor or the reflector, and thus measures the pressure waves.

Optical microphone and method using the same

The invention is related to a data structure for Higher Order Ambisonics HOA audio data, which data structure includes 2D or 3D spatial audio content data for one or more different HOA audio data stream descriptions. The HOA audio data can have on order of greater than '3', and the data structure in addition can include single audio signal source data and/or microphone array audio data from fixed or time-varying spatial positions.

Data structure for higher order ambisonics audio data

The invention is directed to a computer system comprising a server and a client and a method for operating a remote procedure call handler in the client and the server. The Method for operating a remote procedure call handler in the client according to the invention comprises the following steps:

Method for operating a remote procedure call handler in a client and a server and computer system comprising the same

A bit cell of the PROM-device comprises a carbon nanotube having a tilted portion comprising a free end and a fixed portion which is to the reference node. The carbon nanotube comprises a structural defect between the fixed and the tilted portion which causes the carbon nanotube to tilt such that the free end is electrically connected to either the storage electrode or an opposite release electrode.

Programmable read-only memory device and method of writing the same

A clock generation circuit comprises an internal clock signal source providing an internal clock signal and a synchronization device for synchronization the internal clock signal with a reference clock signal provided externally from the clock generation circuit. The synchronization device comprises n delay locked loop circuits, n being an integer greater than 1, each delay locked loop circuit having a clock input for receiving the internal clock signal and a clock output for providing an output clock signal with an individual phase shift that is adjustable. The synchronization device further comprises a multiplexer having n inputs and an output wherein each of the n inputs is connected to an output of one of the n delay locked loops and a control circuit. The control circuit is adapted to adjust at least one of the delay locked loop circuits for providing an individual phase shift according to a current phase shift and to select that input of the multiplexer that receives an output clock signal of the adjusted delay locked loop circuit that is synchronized in frequency and phase with the reference clock signal, wherein the output of the multiplexer provides that output clock signal as synchronized clock signal, and wherein the control circuit is adapted to toggle between the n delay locked loop circuits, in a way that the phase of the internal clock signal is successively shifted according to the current phase shift between the internal clock signal and the reference clock signal.

Clock generation circuit

The field programmable read-only memory device includes a memory cell having a switching element for storing bit information. The switching element provides a switchable electrical connection between a word line and a bit line and includes a static body and a movable connecting element. The switchable electrical connection is non-volatile.

Field programmable read-only memory device

The invention relates to the field of packet-oriented protocols. More particularly, the invention concerns a method of operating a protocol parser generated onto a predefined hardware structure. The protocol is packet-oriented and is hierarchically built from different fields in packets. According to the invention, it comprises: &#x2014;a step of synthesis to define a parser architecture from the hardware structure; &#x2014;a step of processing parser operations based on the hardware architecture.

Hardware-based parser for packet-oriented protocols

An electromechanical switch is described, which comprises a conductive body and a plurality of carbon nanotubes being separate to each other, each of the carbon nanotubes being connected to at least one common terminal electrode with at least one of its ends, wherein in an open state of the switch each of the carbon nanotubes substantially projects along a surface of the conductive body and keeps up a gap to said surface, and wherein in a closed state of the switch at least one carbon nanotube is bend in a direction of the surface to close an electrical contact between said terminal electrode and the conductive body. The size of the gap between the respective carbon nanotube and the surface is different for each one of the plurality of carbon nanotubes.

Growing community of inventors

Wedemark, Germany

Holger Kropp