US5606618A

Title

Subband coded digital transmission system using some composite signals

Application Number:

US19930173850

Publication Date:

25-02-1997

Family ID:

Application Date:

27-12-1993

Declaring Company:

Publication Country:

US

Priority Date:

02-06-1989

Title

Subband coded digital transmission system using some composite signals

Application Number:

US19930173850

Family ID:

Publication Country:

US

Publication Date:

25-02-1997

Application Date:

27-12-1993

Priority Date:

02-06-1989

Declaring Company:

Abstract  Abstract

Reproduction accuracy of for example a digital stereo audio signal is improved by transmitting sample data as sub-signals such as frequency subband signals. In one or more subbands corresponding components such as left and right stereo channels are combined so that only one composite signal is transmitted per subband. An indicator signal is transmitted indicating which subbands are combined. Scale factor signals for all subbands and for the relative intensity of the respective subband signals which were combined may also be transmitted. In the receiver a subband signal is derived for each channel from the composite signal before synthesis of the full channel signals which will be reproduced.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.