Signal encoding apparatus

Claim 2

A signal encoding apparatus in which, for efficient transmission of input signals, the input signals are taken out as signal blocks at a predetermined time interval and the in-block signals are converted by mutually independent conversion axes and subjected to encoding, comprising computing means (13, 14; 42, 43) for computing the proper­ties of said input signals, means (15; 43, 47) for varying the block length of said input signals on the time axis as a function of the computed results by said computing means before taking out the input signals and means (17, 18; 47, 48) for converting the signals in the form of the blocks by mutually independent conversion axes.

Claim 3

A signal encoding apparatus in which, for efficient transmission of input signals, the input signals are taken out as signal blocks at a predetermined time interval and the in-block signals are converted by orthogonal conversion axes and subjected to encoding, comprising storage means (11; 12) for transient storage of said input signals, computing means (13; 14) for computing the energies of input signals held by said storage means, block length determining means (15) for determining the block length of said input signals on the time axis depending on the computed results of said computing means (13, 14), means (17) for grouping the input signals into signal blocks on the time axis depending on the block length deter­mined by the block length determining means, and means (18) for converting the signals thus grouped into blocks by mutually independent conversion axes.

Claim 4

A signal encoding apparatus in which, for efficient transmission of input signals, the input signals are taken out as signal blocks at a predetermined time interval and the in-block signals are converted by orthogonal conversion axes and subjected to encoding, comprising storage means (11; 12) for transient storage of said input signals, computing means (13; 14) for computing the energies of input signals held by said storage means, block length determining means (15) for determining the block length of said input signals on the time axis depending on the computed results of said computing means (13, 14), means (17) for grouping the input signals into signal blocks on the time axis depending on the block length deter­mined by the block length determining means, and means (18) for converting the signals thus grouped into blocks by mutually independent conversion axes.

Claim 5

A signal encoding apparatus in which, for efficient transmission of input signals, the input signals are taken out as signal blocks at a predetermined time interval and the in-block signals are converted by orthogonal conversion axes, comprising a pair of storage means (11, 12) for storage of a pair of input signals offset from each other at a predetermined distance on the time axis, computing means (13, 14) for computing the energies of the paired input signals stored in the respective storage means, comparator means (15) for comparing the energies of said paired input signals computed by said computing means, and quantizing means (18) for converting the paired input signals held by said respective storage means as one signal block by orthogonal conversion axes and encoding the converted signals when the result of comparison is lower than a predeter­mined value, and for converting the paired input signals held by said respective storage means as separate signal blocks by orthogonal conversion axes and quantizing the converted signals when the result of comparison is more than said predetermined value.

Claim 6

A signal encoding apparatus in which, for efficient transmission of input signals, the input signals are taken out as signal blocks at a predetermined time interval and the in-block signals are converted by orthogonal conversion axes, comprising a pair of storage means (11, 12) for storage of a pair of input signals offset from each other at a predetermined distance on the time axis, computing means (13, 14) for computing the energies of the paired input signals stored in the respective storage means, comparator means (15) for comparing the energies of said paired input signals computed by said computing means, and quantizing means (18) for converting the paired input signals held by said respective storage means as one signal block by orthogonal conversion axes and encoding the converted signals when the result of comparison is lower than a predeter­mined value, and for converting the paired input signals held by said respective storage means as separate signal blocks by orthogonal conversion axes and quantizing the converted signals when the result of comparison is more than said predetermined value.

Claim 7

A signal transmission apparatus in which input signals are taken out as signal blocks at a predetermined time interval and the in-block signals are converted by mutually independent conversion axes and subjected to encoding, for thereby effecting efficient transmission of the input signals, comprising storage means (11; 12) for transient storage of said input signals, means (13; 14) for computing the energies of input signals held by said storage means, block length determining means (15) for determining the block length of said input signals on the time axis depending on the computed results of said computing means, signal blocks on the time axis depending on the block length determined by the block length determining means, means (17) for converting the signals thus grouped into blocks by mutually independent conversion axes, and means (2, 4; 3, 5) for transmitting the converted and encoded input signals and block length data obtained at said block length determining means (15).

Claim 8

A signal transmission apparatus in which input signals are taken out as signal blocks at a predetermined time interval and the in-block signals are converted by mutually independent conversion axes and subjected to encoding, for thereby effecting efficient transmission of the input signals, comprising storage means (11; 12) for transient storage of said input signals, means (13; 14) for computing the energies of input signals held by said storage means, block length determining means (15) for determining the block length of said input signals on the time axis depending on the computed results of said computing means, signal blocks on the time axis depending on the block length determined by the block length determining means, means (17) for converting the signals thus grouped into blocks by mutually independent conversion axes, and means (2, 4; 3, 5) for transmitting the converted and encoded input signals and block length data obtained at said block length determining means (15).