US 5,854,600 A · Hidden side code channels

Abstract

An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.

Claims12

Dependent claims

A method for converting and encoding analog signals to a standardized digital format, comprising the steps of:

monitoring the physical characteristics of an analog waveform to be converted to a standardized digital format;
converting said analog waveform to said digital format;
and
encoding as compatible hidden code inserted asynchronously within said standardized digital format information indicative of said physical characteristics of said analog waveform, said information facilitating subsequent more accurate reconstruction of said analog waveform from said digital format.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

08/919,566Filed 29 Aug 1997 · continuation

Priority

29 May 1991

Granted

29 Dec 1998

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G11B 20/10527
Digital recording or reproducing: audio or video recording; Data buffering arrangements
G06J 1/00
Hybrid computing arrangements
H03M 5/04
Conversion to or from representation by pulses: the pulses having two levels
H04B 14/046
Using pulse code modulation: systems or methods for reducing noise or bandwidth

Family

Serial707,073Parent of this continuation · filed 29 May 1991

Serial957,631Parent of this continuation · filed 6 Oct 1992

Serial110,335Parent of this division · filed 20 Aug 1993

Serial456,027Parent of this continuation · filed 31 May 1995

US 5,479,168 AParent of this division · filed 26 Dec 1995

US 5,854,600 AThis patent

From the US filing history. Foreign family members aren’t listed.

Hidden side code channels

Life of this patent

Hidden side code channels

Life of this patent

Abstract

Claims12