Method and apparatus for hybrid analog/digital signal processing
AssigneeMassachusetts Institute of Technology
InventorJae S. Lim
Life of this patent
Estimating the term…
Abstract
Method and apparatus for selectively increasing, decreasing or leaving unaffected the signal-to-noise ratio of portions of an analog transmission signal. As a result it is possible to increase the signal-to-noise ratio of some analog values, decrease the signal-to-noise ratio of other analog values, and leave the signal-to-noise ratio of the remaining values of a given analog signal, so as to better utilize a transmission channel according to the characteristics of the signal to be transmitted.
Claims33
A hybrid analog/digital method of information signal transmission comprising the following steps:
- obtaining a first analog value x.sub.1 which is desired to be transmitted;
- mapping the first analog value x.sub.1 to an analog value y.sub.1 and to B.sub.1 bit(s) of digital information according to a first mapping function;
- transmitting the B.sub.1 bit(s) of digital information;
- and
- transmitting analog value y.sub.1 such that the analog value y.sub.1 can be decoded using the B.sub.1 bit(s) of digital information to obtain a representation of the first analog value x.sub.1.
A hybrid analog/digital information signal transmission system, comprising:
- means for obtaining a first analog value x.sub.1 which is desired to be transmitted;
- means for mapping the first analog value x.sub.1 to an analog value y.sub.1 and B.sub.1 bit(s) of digital information according to a first mapping function;
- means for transmitting the B.sub.1 bit(s) of digital information;
- and
- means for transmitting analog value y.sub.1 such that the analog value y.sub.1 can be decoded using the B.sub.1 bit(s) of digital information to obtain a representation of the first analog value x.sub.1.
A system for receiving a transmission signal which is a hybrid analog/digital representation of a first analog value x.sub.1 which is representative of a first component of a source signal, the system comprising:
- a circuit for receiving the transmission signal and obtaining an analog value y.sub.1 and B.sub.1 bit(s) of digital information representative of the first analog value x.sub.1,
- a circuit for generating a representation of first analog value x.sub.1 by using the B.sub.1 bit(s) of digital information and analog value y.sub.1, wherein said analog value y.sub.1 is related to analog value x.sub.1 according to a mapping function, and
- a circuit for generating said representation of a first component of a source signal based upon said first analog value x.sub.1.
Dependencies are inferred from the claim text.