FIELD: informational signals forming technology.
SUBSTANCE: device has common sigma-delta-modulator for encoding audio-signal and means for periodical changing of coded signal bit by water-mark bit. In such a way, a synchronous combination is inserted into signal. Synchronization bits are inserted at lesser space from each other, than water-mark bits. Synchronous combination is preferably a combination of adjacent bits, which is not usually generated by coder. For sigma-delta-modulator such combination is a series of ones with following series of zeros having practically equal length, or vice versa. Also described is data carrier with signal recorded on it.
EFFECT: efficient extraction of additional data.
3 cl, 6 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| INSERTION OF ADDITIONAL DATA IN CODED SIGNAL | 1998 |
|
RU2201039C2 |
| METHOD AND DEVICE FOR EXTRACTION OF ADDITIONAL DATA FROM INFORMATION SIGNAL | 1999 |
|
RU2249260C2 |
| INSERTING ADDITIONAL DATA IN CODED SIGNAL | 1998 |
|
RU2220511C2 |
| INSERTING ADDITIONAL DATA IN CODED SIGNAL | 2000 |
|
RU2251819C2 |
| METHOD FOR INSERTING ADDITIONAL DATA INTO A SIGNAL | 1999 |
|
RU2249308C2 |
| EMBEDDING WATERMARK INTO A COMPRESSED INFORMATIONAL SIGNAL | 2001 |
|
RU2288546C2 |
| DATA SIGNAL ENCODING | 2007 |
|
RU2407145C2 |
| DECODER FOR DECODING MEDIA SIGNAL AND ENCODER FOR ENCODING SECONDARY MEDIA DATA COMPRISING METADATA OR CONTROL DATA FOR PRIMARY MEDIA DATA | 2015 |
|
RU2679379C2 |
| WATERMARK GENERATOR, WATERMARK DECODER, METHOD OF GENERATING WATERMARK SIGNAL, METHOD OF GENERATING BINARY MESSAGE DATA DEPENDING ON WATERMARKED SIGNAL AND COMPUTER PROGRAM BASED ON IMPROVED SYNCHRONISATION CONCEPT | 2011 |
|
RU2614855C2 |
| EFFECTIVE ENCODING OF SPECTRUM ENVELOPE WITH USE OF VARIABLE RESOLUTION IN TIME AND FREQUENCY AND SWITCHING TIME/FREQUENCY | 2000 |
|
RU2236046C2 |
