Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Arnoldus W J Oomen

Renatus Josephus Van Der Vleuten

Albertus Cornelis Den Brinker

Leon Maria Van De Kerkhof

Andreas Johannes Gerrits

Alphons A M L Bruekers

Marek Zbigniew Szczerba

Marc Klein Middelink

Erik G P Schuijers

Paulus H A Dillen

A data compression apparatus for data compressing an audio signal includes an input terminal () for receiving the audio signal, a 1-bit A/D converter () for A/D converting the audio signal so as to obtain a bitstream signal, a lossless coder () for carrying out a lossless data compression step on the bitstream signal so as to obtain a data-compressed bitstream signal, and an output terminal () for supplying the data-compressed bitstream signal.

Data compression and expansion of an audio signal

A data processing apparatus for data processing an audio signal includes an input terminal () for receiving the audio signal, a 1-bit A/D converter () for A/D converting the audio signal to for a bitstream signal, a prediction unit () for carrying out a prediction step on the bitstream signal to form a predicted bitstream signal, a signal combination unit () for combining the bitstream signal and the predicted bitstream signal to form a residue bitstream signal, and an output terminal () for supplying the residual bitstream signal.

Bitstream data reduction coding by applying prediction

A data compression apparatus is disclosed for data compressing an audio signal. The data compression apparatus comprises an input terminal ( ) for receiving the audio signal, a 1-bit A/D converter ( ) for A/D converting the audio signal so as to obtain a bitstream signal, a lossless coder ( ) for carrying out a lossless data compression step on the bitstream signal so as to obtain a data compressed bitstream signal, and an output terminal ( ) for supplying the data compressed bitstream signal. Further, a recording apparatus and a transmitter apparatus comprising the data compression apparatus are disclosed. In addition, a data expansion apparatus for data expanding the data compressed bitstream signal supplied by the data compression apparatus is disclosed, as well as a reproducing apparatus and a receiver apparatus comprising the data expansion apparatus.

A data processing apparatus includes an input terminal for receiving an audio signal, a 1-bit A/D converter for A/D converting the audio signal into a 1-bit bitstream signal, and a prediction unit for carrying out a prediction step on the bitstream signal so as to obtain a predicted bitstream signal. The data processing apparatus further includes a signal combination unit for combining the bitstream signal and the predicted bitstream signal so as to obtain a residue bitstream signal. A recording apparatus or a transmitter apparatus can use the data processing apparatus. The residue bitstream signal is data compressed by lossless encoding and then error encoded and channel encoded prior to transmission through a media.

Processing an audio bitstream signal

A data processing apparatus includes an input terminal for receiving an audio signal, a 1-bit A/D converter for A/D converting the audio signal so as to obtain a bitstream signal, and a prediction unit for carrying out a prediction step on the bitstream signal so as to obtain a predicted bitstream signal. The data processing apparatus further includes a signal combination unit for combining the bitstream signal and the predicted bitstream signal so as to obtain a residue bitstream signal, and an output terminal for supplying the residual bitstream signal. A recording apparatus or a transmitter apparatus can use the data processing apparatus.

Data processing of a bitstream signal

An apparatus for data compressing an analog audio signal includes an input terminal for receiving the audio signal and a 1-bit A/D converter for A/D converting the audio signal to a digital bitstream signal. The apparatus has a lossless coder for lossless data compression of the bitstream signal to a data compressed bitstream signal, and has an output terminal for supplying the data compressed bitstream signal. A recording apparatus and a transmitter apparatus use the data compression apparatus. An apparatus for expanding the data compressed bitstream signal to a replica of the analog audio signal is used by a reproducing apparatus and a receiver apparatus.

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Eindhoven, Netherlands

Arnoldus W J Oomen