 Electric artificial larynx |
| It is an object of the present invention which has been made to solve the above problem to provide ... |
|
| Audio reproducing apparatus corresponding to picture |
| In view of such aspects, an object of the present invention is to provide an audio reproducing ... |
|
| Electro-optical device |
| With the above-mentioned problems with such prior arts in view, the present invention has been ... |
|
| Method of transmitting an audio signal |
| What is claimed is: 1. A method of transmitting an analog audio signal in digital form to be ... |
|
| Hot water tank assembly |
| The present invention provides in a first embodiment, a hot water heater for a portable dispenser ... |
|
| Cryptographic key split combiner |
| It is therefore an object of the present invention to provide a process and apparatus for ... |
|
| Secure mass storage system for computers |
| In accordance with one embodiment of the present invention, it is an object of the present ... |
|
| Enhanced cryptographic system and method with key escrow feature |
| It is one object of this invention to provide a commercial key escrow system that uses published ... |
|
| Method and corresponding system for influencing the stereo channel separation of an audiosignal |
| A method and a radio receiver according to the present invention have an advantage in that if ... |
|
|
Subband coded digital transmission system using some composite signals
| Details |
Inventors: Lokhoff, Gerardus C. P.; Dehery, Yves-Francois; Stoll, Gerhard J.; Theile, Gunther;
Assignee: U.S. Philips Corporation (New York, NY)
Primary Examiner: Isen; Forester W.
Assistant Examiner:
Attorney, Agent or Firm: Treacy; David R.
Reproduction accuracy of, for example a digital stereo audio signal, is improved by transmitting sample data as sub-signals such as frequency subband signals. In one or more subbands, corresponding components such as left and right stereo channels are combined so that only one composite signal is transmitted per subband. An indicator signal is transmitted, indicating which subbands are combined. Scale factor signals for all subbands, and for the relative intensity of the respective subband signals which were combined, may also be transmitted. In the receiver a subband signal is derived for each channel from the composite signal, before synthesis of the full channel signals which will be reproduced. |
|
DETAILED DESCRIPTION What is claimed is: 1.
A digital transmission system, for producing a replica of a digital signal comprising at least a first component and a second component, comprising: an encoder including analysis means for altering said digital signal to obtain a plurality of sub-signals, including at least a first sub-signal and a second sub-signal from said first component and said second component respectively, signal combination means for combining said first sub-signal and said second sub-signal to obtain a composite sub-signal, signal generator means for generating an indicator signal indicating that said first sub-signal and said second sub-signal are combined, transmission means for transmitting said indicator signal, said composite sub-signal, and sub-signals which have not been combined, receiving means for receiving the signals which were transmitted, means, responsive to the received indicator signal and composite subsignal, for generating a signal related to at least one of said first component and said second component, and a decoder including synthesis means for combining the transmitted subsignals and the signal related to at least one of said first component and said second component to produce said replica of the digital signal.
2.
A system as claimed in claim 1, characterized in that said first and second component represent information relating to the stereo nature of an audio signal.
3.
A system as claimed in claim 1, characterized in that said analysis means subdivides said digital signal into sub-signals which are subband signals representing respective frequency subbands and said components.
4.
A digital transmission system, for producing a replica of a digital signal comprising at least a first and a second component, comprising a transmitter and a receiver, wherein said transmitter comprises: an encoder including analysis means for filtering said digital signal to obtain subband signals for M subbands, where M>1, said subband signals including a plurality of first subband signals and a plurality of second subband signals from said first component and second component respectively, signal combination means for combining m
|
| Related patents |
|
|
Low bit-rate high-resolution spectral envelope coding for audio encoder and decoder
I claim: 1. An encoder of one or more channels of input signals comprising signal samples, said encoder comprising splitband means for generating a subband signal block ...
|
|
|
Montgomery reduction apparatus
OF THE INVENTION A Montgomery reduction apparatus and method of the present invention aim at more efficiently implementing Montgomery reduction as an algorithm for ...
|
|
|
Audio system for vehicular application
Systems and methods in accordance with the invention enable virtually infinite segmentation and modification of the audio frequency spectrum by transfer of signals from ...
|
|
|
Medium having photographically recorded digital audio bits
The invention is a medium (such as motion picture film) having digital audio signals photographically recorded thereon. The medium can be motion picture film. Multiple, ...
|
|
|
Digital hearing aid
Therefore, it is an object of the present invention to provide a digital hearing aid which can output a voice easy to hear for a user. According to the first aspect of ...
|
|
|
Apparatus for creating 3D audio imaging over headphones using binaural synthesis
Accordingly, it is an object of the present invention to provide an apparatus for creating three-dimensional audio imaging during playback over headphones using a ...
|
|
|
System, apparatus, and method for improving speech quality in multi-party devices
A method, system, and apparatus are provided, such that cross talk terms may be removed from speech signals in a multi-party conference system, having a plurality of ...
|
|
|
Speaker excursion control system
OF THE PREFERRED EMBODIMENT Referring initially to FIG. 1, there is shown a sound system which may be incorporated into a vehicle. The system includes a power supply 10 ...
|
|
|
Portable information terminal device with radio selective-calling receiver
In view of the foregoing, it is an object of the present invention to provide a portable information terminal device with a radio selective-calling receiver for ...
|
|
|
Digital graphic equalizer
An object of the invention is to remedy the major problems of prior digital graphic equalizers and, in particular, to provide an improved digital graphic equalizer ...
|
|
|
Audio Signal Processing 
