Merimaa
Juha Merimaa, Espoo FI
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20100322431 | METHOD FOR REPRODUCING NATURAL OR MODIFIED SPATIAL IMPRESSION IN MULTICHANNEL LISTENING - The invention concerns a method for reproducing spatial impression of existing spaces in multichannel or binaural listening. It consists of following steps/phases: a) Recording of sound or impulse response of a room using multiple microphones, b) Time- and frequency-dependent processing of impulse responses or recorded sound, c) Processing of sound to multichannel loudspeaker setup in order to reproduce spatial properties of sound as they were in recording room, and (alternative to c), d) Processing of impulse response to multichannel loudspeaker setup, and convolution between rendered responses and an arbitrary monophonic sound signal to introduce the spatial properties of the measurement room to the multichannel reproduction of the arbitrary sound signal, and is applied in sound studio technology, audio broadcasting, and in audio reproduction. | 12-23-2010 |
Juha Merimaa, Santa Cruz, CA US
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20080205676 | Phase-Amplitude Matrixed Surround Decoder - A frequency domain method for phase-amplitude matrixed surround decoding of 2-channel stereo recordings and soundtracks, based on spatial analysis of 2-D or 3-D directional cues in the recording and re-synthesis of these cues for reproduction on any headphone or loudspeaker playback system. | 08-28-2008 |
Juha O. Merimaa, Menlo Park, CA US
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20090092258 | CORRELATION-BASED METHOD FOR AMBIENCE EXTRACTION FROM TWO-CHANNEL AUDIO SIGNALS - A method of ambience extraction includes analyzing an input signal to determine the time-dependent and frequency-dependent amount of ambience in the input signal, wherein the amount of ambience is determined based on a signal model and correlation quantities computed from the input signals and wherein the ambience is extracted using a multiplicative time-frequency mask. Another method of ambience extraction includes compensating a bias in the estimation of a short-term cross-correlation coefficient. In addition, systems having various modules for implementing the above methods are disclosed. | 04-09-2009 |
Juha O. Merimaa, Redwood City, CA US
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20130329896 | SYSTEMS AND METHODS FOR DETERMINING THE CONDITION OF MULTIPLE MICROPHONES - Systems and methods for determining the operating condition of multiple microphones of an electronic device are disclosed. A system can include a plurality of microphones operative to receive signals, a microphone condition detector, and a plurality of microphone condition determination sources. The microphone condition detector can determine a condition for each of the plurality of microphones by using the received signals and accessing at least one microphone condition determination source. | 12-12-2013 |
20130329912 | SYSTEMS AND METHODS FOR ADJUSTING AUTOMATIC GAIN CONTROL - Automatic gain control systems disclosed herein can incorporate a confidence metric that can estimate the accuracy of gain adjustments calculated by an automatic gain control module. The confidence metric may be based on a percentage of valid audio samples in a given period of time. Based on the confidence metric, the AGC response may be reduced, delayed, frozen, or otherwise altered from the baseline gain adjustment. Time-averaging process may be used to estimate the input signal power level and determine an appropriate baseline gain adjustment. Additionally, weighting functions can be adjusted to prevent overestimation of the signal power. | 12-12-2013 |
Juha Oskari Merimaa, Menlo Park, CA US
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20090092259 | Phase-Amplitude 3-D Stereo Encoder and Decoder - A two-channel phase-amplitude stereo encoding and decoding scheme enabling flexible and spatially accurate interactive 3-D audio reproduction via standard audio-only two-channel transmission. The encoding scheme allows associating a 2-D or 3-D positional localization to each of a plurality of sound sources by use of frequency independent inter-channel phase and amplitude differences. The decoder is based on frequency-domain spatial analysis of 2-D or 3-D directional cues in a two-channel stereo signal and re-synthesis of these cues using any preferred spatialization technique, thereby allowing faithful reproduction of positional audio cues and reverberation or ambient cues over arbitrary multi-channel loudspeaker reproduction formats or over headphones, while preserving source separation despite the intermediate encoding over only two audio channels. | 04-09-2009 |
Pirjo Merimaa, Helsinki FI
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20150289531 | AN AROMA MILK COMPOSITION COMPRISING DIACETYL AND USES THEREOF - The present invention relates to an aroma milk composition comprising diacetyl and diacetyl producing strains and a method of producing it. Further, the present invention relates to use of the aroma milk composition in the manufacture of a dairy product, in particular butter product. Finally, the present invention relates to a new bacterial strain of | 10-15-2015 |