Abstract: There are two different methods of embedding supplemental data, e.g. for watermarking into an encoded signal. I. For an encoder, which needs auxiliary information for encoding (=probability information in this special case), the auxiliary information to encode the supplemental data is derived from data used otherwise in the encoding process. The advantage is that the derived auxiliary data does not have to be stored, so that embedding the supplemental data is economical with respect to the total amount of bits used. II. In the encoding process used for super Audio CD, a set of parameters (e.g. filter coefficients) is used by the encoder, whereby these parameters have to be stored, as they are needed for decoding. To embed supplemental data, at least one of the chosen parameters (e.g. the LSB of the first coefficient) is set to a dedicated value in response to the value of the supplemental data to be embedded. The advantage is that the bit rate will not be affected at all.

Abstract: A data compression apparatus for data compressing an audio signal includes an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal so as to obtain a bitstream signal, a lossless coder (10) 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 (14) for supplying the data-compressed bitstream signal.

Abstract: A data processing apparatus for data processing an audio signal includes an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal to for a bitstream signal, a prediction unit (10) for carrying out a prediction step on the bitstream signal to form a predicted bitstream signal, a signal combination unit (42) for combining the bitstream signal and the predicted bitstream signal to form a residue bitstream signal, and an output terminal (14) for supplying the residual bitstream signal.

Abstract: An apparatus for deriving amplitude values from an input information signal, which amplitude values can he used as reference levels for the states of a finite state machine, which are needed for the computation of the likelihood functional in a partial response maximum likelihood bit detection apparatus. The apparatus includes an input for receiving the input information signal, a conversion device that derives a digital signal from the input information signal, a detection device for repeatedly detecting a state from subsequent sequences of n subsequent bits in the digital signal, a sample value determining mechanism for deriving sample values from input information signal, a processing mechanism for processing the sample values belonging to sequences of n bits of the same state, an output mechanism for supplying the processed signal values for each possible state as the amplitude values that can be used in the partial response maximum likelihood bit detection apparatus.

Abstract: A data compression apparatus is disclosed for data compressing an audio signal. The data compression apparatus comprises an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal so as to obtain a bitstream signal, a lossless coder (10) 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 (14) 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.

Abstract: A data compression apparatus is disclosed for data compressing an audio signal. The data compression apparatus comprises an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal so as to obtain a bitstream signal, a lossless coder (10) 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 (14) 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.

Abstract: An apparatus for deriving amplitude values from an input information signal is proposed, which amplitude values can be used as reference levels for the states of a finite state machine, which are needed for the computation of the likelihood functional in a partial response maximum likelihood bit detection apparatus.

Abstract: Apparatus for deriving from an input information signal (IIS) amplitude values usable as reference levels for finite state machine states. The apparatus includes: conversion apparatus for deriving a digital signal from the IIS; detection apparatus for repeatedly detecting a state from sequences of n subsequent bits in the digital signal; sample value apparatus for deriving sample values from the IIS, one sample value for each sequence of n bits; processing apparatus for processing the sample values belonging to sequences of n bits of the same state, and for carrying out this processing step for all states, to obtain a processed signal value for each state; output apparatus for supplying the processed signal values for each state as the amplitude values; and apparatus to use the amplitude values for the possible states, obtained from a first portion of the IIS, for detecting bits from a second portion of the IIS.

Abstract: A data processing apparatus is disclosed for data processing an audio signal. The data processing apparatus comprises an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal so as to obtain a bitstream signal, a prediction unit (10) for carrying out a prediction step on the bitstream signal so as to obtain a predicted bitstream signal, a signal combination unit (42) for combining the bitstream signal and the predicted bitstream signal so as to obtain a residue bitstream signal, and an output terminal (14) for supplying the residual bitstream signal (FIG. 1). Further, a recording apparatus (FIG. 4) and a transmitter apparatus (FIG. 5) comprising the data processing apparatus are disclosed. Other data processing apparatuses can be found in the FIGS. 18, 19 and 20.

Abstract: 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.

Abstract: In a transmitter digital information signal is lossy encoded to form a lossy encoded signal. The lossy encoded signal is decoded to form a lossy replica signal. The lossy replica signal and the digital information signal are combined to form a first residue signal. The first residue signal is predicted, yielding a first predicted signal. The first predicted signal is losslessly entropy encoded (e.g. adaptive Huffman encoded) to provide a lossless residue signal. Both the lossy signal and the lossless residue signal are transmitted via the transmission medium. In a receiver, the lossy signal and lossless residue are separated. The lossy signal is decoded to form a lossy replica of the digital information signal. The lossless residue signal is entropy decoded (e.g. adaptive Huffman decoder) to form a second residue signal. The second residue signal is predicted, yielding a second predicted signal. The second predicted signal is combined with the lossy representation to reproduce the digital information signal.

Abstract: A radio or television receiver for receiving a plurality of signals, includes a selector for selecting a selected signal and a identifier for assigning an identity to each signal, e.g. a preset number. The receiver includes a history device for maintaining a list of identities of previously selected signals, a navigation device for traversing the list, and for selecting the signal corresponding to the identity at a current position.

Abstract: A data compression apparatus for data compressing an information signal, which is in n-level form, n being larger than 2. The data compression apparatus includes an input terminal for receiving the n-level information signal, an entropy coder, such as an arithmetic coder having an input for receiving an input signal, which is adapted to carry out a lossless encoding step on the input signal, so as to obtain a data compressed output signal at an output. The apparatus further includes a prediction filter for carrying out a prediction step on the n-level information signal so as to obtain a prediction signal and a probability signal determining unit for generating the probability signal in response to the prediction signal. An output terminal is available for supplying the data compressed output signal. Further, a data expansion apparatus is disclosed.

Abstract: A data compression apparatus is disclosed for data compressing an information signal, which is in n-level form, n being larger than 2. The data compression apparatus comprises an input terminal (1) for receiving the n-level information signal, an entropy coder, such as an arithmetic coder (4) having an input (2) for receiving an input signal, which is adapted to carry out a lossless encoding step on the input signal, so as to obtain a data compressed output signal at an output (6). The apparatus further comprises a prediction filter (12) for carrying out a prediction step on the n-level information signal so as to obtain a prediction signal and a probability signal determining unit (18) for generating the probability signal in response to said prediction signal. An output terminal (8) is available for supplying said data compressed output signal. (FIG. 1) Further, a data expansion apparatus is disclosed. (FIG.

Abstract: 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.

Abstract: A digital information signal is compressed into an encoded signal and coefficient data. The coefficient data is predicted, yielding a prediction signal. The coefficient data and the prediction signal are combined to a data signal. Both the encoded signal and the data signal are transmitted via the transmission medium.

Abstract: 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.

Abstract: A data processing apparatus is disclosed for data processing an audio signal. The data processing apparatus comprises an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal so as to obtain a bitstream signal, a prediction unit (10) for carrying out a prediction step on the bitstream signal so as to obtain a predicted bitstream signal, a signal combination unit (42) for combining the bitstream signal and the predicted bitstream signal so as to obtain a residue bitstream signal, and an output terminal (14) for supplying the residual bitstream signal (FIG. 1). Further, a recording apparatus (FIG. 4) and a transmitter apparatus (FIG. 5) comprising the data processing apparatus are disclosed. Other data processing apparatuses can be found in the FIGS. 18, 19 and 20.

Abstract: A data compression apparatus is disclosed for data compressing a plurality of information signals. The data compression apparatus comprises input terminals (1,2) for receiving the information signals, prediction units (6,8) for carrying out a prediction step on the plurality of information signals so as to obtain a plurality of prediction signals, probability signal determining units (12,14) for generating in response to the plurality of information signals a corresponding plurality of probability signals, a first switching unit (4) for each time selecting a symbol in one a plurality of input signals applied to the first switching unit, a second switching unit (10) for each time selecting a probability signal corresponding to the symbol selected by the first switching unit, a control signal generator unit (24) for generating switching control signals for the first and second switching units (4,10), a lossless coding unit (18) and an output terminal (22) for supplying said data compressed output signal.

Abstract: The invention relates to the coding of digital information signal blocks comprising representation symbols, such as sampled values, by means of an adaptive variable-length coding, such as Huffman coding. The JPEG Standard also utilizes adaptive Huffman coding but the coding in accordance with this standard is inefficient when a comparatively large number of Huffman coding tables are to be transmitted. According to the invention, in the case of a small number of representation symbols per information signal block, the probabilities of occurrence of each of the representation symbols are transmitted together with the variable-length-coded representation symbols, a similar (de)coding table being generated both in the encoder and in the decoder on the basis of said probabilities.