1
Willem F Druyvesteyn, Abraham Hoogendoorn, Leon M Van De Kerkhof, Raymond N J Veldhuis: Coder for incorporating an auxiliary information signal in a digital audio signal, decoder for recovering such signals from the combined signal, and record carrier having such combined signal recorded thereon. U S Philips Corporation, Leroy Eason, November 3, 1992: US05161210 (254 worldwide citation)

The audio signal is divided into frequency sub-bands, the sub-band samples are quantized according to a predetermined quantizing criterion, and the quantized samples in one or more sub-bands are summed with samples of the auxiliary signal in such sub-bands, the auxiliary signal sample in a sub-band ...


2
Raymond N J Veldhuis, Gerrit J Keesman: Device for transmitting data words representing a digitalized analog signal and device for receiving the transmitted data words. U S Philips Corporation, Leroy Eason, September 8, 1992: US05146457 (117 worldwide citation)

A system for transmitting digitized analog information includes, for the purpose of transmitting an additional information signal apparatus for modifying the bit of low significance of every n-th data word representing the digitized information depending on the bits of an additional information sign ...


3
Raymond N J Veldhuis, Robbert G van der Waal, Marcel Breeuwer: System for subband coding of a digital audio signal. U S Philips Corporation, Algy Tamoshunas, Marianne R Rich, January 23, 1990: US04896362 (93 worldwide citation)

A system for subband coding of a digital audio signal x(k) includes in the coder (1) a filter bank (3) for splitting the audio signal band, with sampling rate reduction, into subbands (p=1, . . . P) of approximately critical bandwidth and in the decoder (2) a filter bank (5) for merging these subban ...


4
Raymond N J Veldhuis: Apparatus and method for reproducing digitized video pictures, with inclined plane error restoration. U S Philips Corporation, Michael E Marion, January 30, 1990: US04897724 (91 worldwide citation)

A device for reproducing digitally presented video pictures includes a restoration circuit for restoring erroneous picture elements. To this end a reference sub-picture is composed of erroneous and correct picture elements, the erroneous picture elements being entirely enclosed by the correct pictur ...


5
Arnoldus W J Oomen, Marc E Groenewegen, Robbert G Van Der Waal, Raymond N J Veldhuis: Method and apparatus for coding digital sound by subtracting adaptive dither and inserting buried channel bits and an apparatus for decoding such encoding digital sound. U S Philips Corporation, Richard A Weiss, July 15, 1997: US05649054 (75 worldwide citation)

For encoding sound received as a stream of multibit input sample, from a finite length sequence of input samples, an instantaneous audibility threshold characteristic is determined. Next, a shaped, dither determined, signal is subtracted from the input samples to produce processing samples. Subtract ...


6
Raymond N J Veldhuis, Robbert G van der Waal, Marcel Breeuwer: System for subband coding of a digital audio signal and coder and decoder constituting the same. U S Philips Corporation, Leroy Eason, April 14, 1992: US05105463 (56 worldwide citation)

A system for subband coding of a digital audio signal x(k) includes in the coder (1) a filter bank (3) for splitting the audio signal band, with sampling rate reduction, into subbands (p=1, . . . P) of approximately critical bandwidth and in the decoder (2) a filter bank (5) for merging these subban ...


7
Raymond N J Veldhuis, Gerrit J Keesman: Transmitter, encoding system and method employing use of a bit allocation unit for subband coding a digital signal. U S Philips Corporation, Richard A Weiss, November 22, 1994: US05367608 (32 worldwide citation)

Transmitter, encoding system and method for subband coding a digital signal. The encoding system includes a splitter unit for dividing the digital signal into subband signals SB.sub.1, . . . , SB.sub.p ; a quantizer unit for quantizing time-equivalent q sample signal blocks of the subband signals; a ...


8
Raymond N J Veldhuis, Robbert G van der Waal, Leon M van de Kerkhof: Subband coding of a digital signal in a stereo intensity mode. U S Philips Corporation, Richard A Weiss, April 15, 1997: US05621855 (29 worldwide citation)

Subband coding a digital signal having a first and a second signal component in a stereo intensity mode. The digital signal is subband coded to produce a first subband signal having a first q-sample signal block in response to the first signal component, and a second subband signal having a second q ...


9
Raymond N J Veldhuis, Robbert G van der Waal, Leon M van de Kerkhof, Gerrit J Keesman: Transmitter, encoding system and method employing use of a bit need determiner for subband coding a digital signal. U S Philips Corporation, Richard A Weiss, November 15, 1994: US05365553 (21 worldwide citation)

Transmitter, encoding system and method for subband coding a digital signal. The encoding system includes a splitter for dividing the digital signal into subband signals SB.sub.1, . . . , SB.sub.M ; a quantizer unit for quantizing time-equivalent q sample signal blocks of the subband signals; a bit ...


10
Jean B Rault, Yves F Dehery, Jean Y Roudaut, Alphons A M L Bruekers, Raymond N J Veldhuis: Digital transmission system using subband coding of a digital signal. David R Treacy, May 25, 1993: US05214678 (20 worldwide citation)

A digital transmission system is disclosed having a transmitter (3,6,9) and a receiver (13,16,19) for transmitting a digital signal, such as a digital audio signal, having a given sampling rate F.sub.S. The digital signal is subband coded into M subbands with sampling rate reduction. To that purpose ...