Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8081764 | Audio decoder Provided is an audio decoder which can reduce an amount of arithmetic operations while suppressing occurrence of aliasing noise. The audio decoder includes: a decoder (102) and an analysis filter bank (110) which generate, from a coded down-mixed signa... | 12/20/2011 |
| 8073144 | Stereo balance interpolation The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, whic... | 12/06/2011 |
| 8054981 | Energy dependent quantization for efficient coding of spatial audio parameters Parameters being a measure for a characteristic of a channel or of a pair of channels, wherein the parameter is a measure for a characteristic of the channel or of the pair of channels with respect to another channel of a multi-channel signal can be quantized more e... | 11/08/2011 |
| 8041042 | Method, system, apparatus and computer program product for stereo coding A method, system, apparatus and computer program product are provided for improved stereo coding. In particular, the method, system, apparatus and computer program product provide a technique for performing Mid-Side (M/S) stereo coding, in which an additional step i... | 10/18/2011 |
| 8041041 | Method and system for providing stereo-channel based multi-channel audio coding A system for generating stereo-channel audio signals with surround information is disclosed. The system includes a surround mapping unit configured to receive signals from a number of audio channels and generate a pair of stereo-channel audio signals based on the au... | 10/18/2011 |
| 8027480 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 09/27/2011 |
| 8023660 | Apparatus, method and computer program for providing a set of spatial cues on the basis of a microphone signal and apparatus for providing a two-channel audio signal and a set of spatial cues An apparatus for providing a set of spatial cues associated with an upmix audio signal having more than two channels on the basis of a two-channel microphone signal has a signal analyzer and a spatial side information generator. The signal analyzer is configured to ... | 09/20/2011 |
| 8014534 | Efficient and scalable parametric stereo coding for low bitrate audio coding applications The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, whic... | 09/06/2011 |
| 8014535 | Multichannel spectral vector mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 09/06/2011 |
| 7986789 | Method for representing multi-channel audio signals A multi-channel input signal having at least three original channels is represented by a parameter representation of the multi-channel signal. A first balance parameter, a first coherence parameter, or a first inter-channel time difference between a first channel pa... | 07/26/2011 |
| 7965849 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 06/21/2011 |
| 7961890 | Multi-channel hierarchical audio coding with compact side information A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hiera... | 06/14/2011 |
| 7933417 | Encoding device and decoding device The present invention relates to an encoding device for saving the number of bits of codes. In step S11, the differential value between a normalization coefficient Bi to be encoded and a normalization coefficient Bi-1 for an encoding uni... | 04/26/2011 |
| 7933416 | Method and apparatus for encoding and decoding multi-channel signals A method of encoding multi-channel signals having two or more channels into a first signal and a second signal, and an apparatus to perform the method, the method including generating the first signal by performing a first operation using a first channel signal in t... | 04/26/2011 |
| 7903824 | Compact side information for parametric coding of spatial audio At an audio encoder, cue codes are generated for one or more audio channels, wherein a combined cue code (e.g., a combined inter-channel correlation (ICC) code) is generated by combining two or more estimated cue codes, each estimated cue code estimated from a group... | 03/08/2011 |
| 7899191 | Synthesizing a mono audio signal The invention relates to a method of synthesizing a mono audio signal 3 based on an available encoded multichannel audio signal 2. The encoded multichannel audio signal 2 is assumed to comprise at least for a part of an audio frequency band sepa... | 03/01/2011 |
| 7876905 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 01/25/2011 |
| 7873171 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 01/18/2011 |
| 7864966 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 01/04/2011 |
| 7826621 | Configurable filter for processing television audio signals A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The e... | 11/02/2010 |
| 7813513 | Multi-channel encoder There is described a method of encoding input signals (CHI to CH3; 400 to 450) in a multi-channel encoder (5; 15) to generate corresponding output data comprising down-mix output signals (610, 620) together with complementary parametric d... | 10/12/2010 |
| 7801314 | Audio signal processing apparatus In an audio signal encoding apparatus, a first audio signal and a second audio signal are added into an addition-result signal. The first audio signal is subtracted from the second audio signal to generate a subtraction-result signal. A first difference signal is ge... | 09/21/2010 |
| 7796765 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 09/14/2010 |
| 7792308 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 09/07/2010 |
| 7792306 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 09/07/2010 |
| 7792305 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 09/07/2010 |
| 7792307 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 09/07/2010 |
| 7787632 | Support of a multichannel audio extension The invention relates to methods and units supporting a multichannel audio extension. In order to allow an efficient extension requiring a low computational complexity, it is proposed that at an encoding end, at least state information is provided as side informatio... | 08/31/2010 |
| 7783052 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 08/24/2010 |
| 7773758 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 08/10/2010 |
| 7769180 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 08/03/2010 |
| 7769178 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 08/03/2010 |
| 7769179 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 08/03/2010 |
| 7769181 | Multichannel spectral mapping audio apparatus and method A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional ste... | 08/03/2010 |
| 7751572 | Adaptive residual audio coding An audio signal having at least two channels can be efficiently down-mixed into a downmixe signal and a residual signal, when the down-mixing rule used depends on a spatial parameter that is derived from the audio signal and that is post-processed by a limiter to ap... | 07/06/2010 |
| 7734053 | Encoding apparatus, encoding method, and computer product An encoding apparatus compresses a stereo signal using a sum signal and a difference signal of a left component signal and a right component signal of the stereo signal. The encoding apparatus includes a calculating unit that calculates complexity of the sum signal ... | 06/08/2010 |
| 7720231 | Encoding audio signals The encoder transforms the audio signals (x(n),y(n)) from the time domain to audio signal (X(k),Y(k)) in the frequency domain, and determines the cross-correlation function (Ri, Pi) in the frequency domain. A complex coherence value (Qi) is calculated by summing the... | 05/18/2010 |
| 7646875 | Stereo coding and decoding methods and apparatus thereof A method of encoding input signals (l, r) to generate encoded data (100) is provided. The method involves processing the input signals (l, r) to determine first parameters (φ1, φ2) describing relative phase difference and temporal diff... | 01/12/2010 |
| 7602922 | Multi-channel encoder There is described a multi-channel encoder (10; 600) for processing input signals conveyed in N input channels to generate corresponding output signals conveyed in M output channels together with complementary parametric data; M and N are integers wherein N>M... | 10/13/2009 |
| 7564978 | Advanced processing based on a complex-exponential-modulated filterbank and adaptive time signalling methods A multi-channel decoder is provided for decoding a mono signal and an associated inter-channel coherence measure, the inter-channel coherence measure representing a coherence between a plurality of original channels, the mono signal being derived from the plurality ... | 07/21/2009 |
