Digital signal transmission apparatus

Claim 2

A digital signal transmission apparatus for transmitting a digital signal having a header of a predetermined length, wherein said header comprises: a synchronization signal; and an auxiliary data signal comprising an error code data signal and a redundant code, said error code data signal being selected from a first error code data signal and second error code data signal; said redundant code having a syndrome pattern associated with said error code data signal which indicates which of said first error code data signal and said second error code data signal is comprised in said auxiliary data signal.

Claim 3

A digital signal transmission apparatus for transmitting a digital signal, wherein said digital signal comprises: a two-dimensional array of digital data information signals, having a horizontal direction and a vertical direction, and wherein a first error detection code is encoded in said vertical direction to form a first redundant code, and a second error detection code is encoded in said horizontal direction to form a second redundant code, said first and second error detection codes having a syndrome pattern respectively associated therewith; and including: means (10) for adding a header comprising a synchronization signal and an auxiliary data signal to said digital signal, wherein said auxiliary data signal comprises an error code data signal and a third redundant error detection code, the error code data signal is selected from a first error code signal and a second error code signal wherein said error code data signal is encoded with said first error detection code when said error code data signal is said first error code data signal, and said error code data signal is encoded with said first error detection code and said second error detection code when said error code data signal is said second error code data signal, and wherein said third redundant code is formed so that said syndrome pattern distinguishes said auxiliary data signal including said first error code signal from said auxiliary data signal including said second error code signal.

Claim 4

A digital signal transmission apparatus for transmitting a digital signal, wherein said digital signal comprises: a two-dimensional array of digital data information signals, having a horizontal direction and a vertical direction, and wherein a first error detection code is encoded in said vertical direction to form a first redundant code, and a second error detection code is encoded in said horizontal direction to form a second redundant code, said first and second error detection codes having a syndrome pattern respectively associated therewith; and including: means (10) for adding a header comprising a synchronization signal and an auxiliary data signal to said digital signal, wherein said auxiliary data signal comprises an error code data signal and a third redundant error detection code, the error code data signal is selected from a first error code signal and a second error code signal wherein said error code data signal is encoded with said first error detection code when said error code data signal is said first error code data signal, and said error code data signal is encoded with said first error detection code and said second error detection code when said error code data signal is said second error code data signal, and wherein said third redundant code is formed so that said syndrome pattern distinguishes said auxiliary data signal including said first error code signal from said auxiliary data signal including said second error code signal.

Claim 5

Apparatus according to claim 2 wherein said first error code signal forming said auxiliary data signal is an address signal, and said second error code signal is a sub-code or said second redundant code.

Claim 6

Apparatus according to claim 2 wherein said first error code signal forming said auxiliary data signal is an address signal, and said second error code signal is a sub-code, said second redundant code, or a digital information signal.

Claim 7

A digital data recording and reproduction apparatus comprising: an A/D converter (2) for converting an analogue input signal having a field frequency associated therewith into a digital data signal having a sampling frequency associated therewith; an encoder (14) for adding an error correction code to said digital data signal to generate an encoded digital data signal; and means (HA, HB) for magnetically recording said encoded digital data signal onto a magnetic tape (T) having at least one track, said means (HA, HB) for magnetically recording having rotational magnetic heads (HA, HB), wherein: said encoder (14) generates said error correction code, said error correction code has a data frame arranged as a two-dimensional array having a preselected size, said array size including at least a first word number and a second word number, each of said first and second word numbers being an integral value determined by said sampling frequency of said digital data signal divided by said field frequency; said data frame has a first plurality of blocks and a second plurality of blocks, said first plurality of blocks comprises a pulse code modulated audio data area and said second plurality of blocks comprises a header area, said header area being composed of a synchronization signal and auxiliary data; said auxiliary data comprise an error code data signal and a redundant code, said error code data signal being a first error code data signal or a second error code data signal; and said redundant code indicates the error code data signal selected, and said redundant code has a syndrome pattern associated therewith to distinguish said error code data signal selected.

Claim 8

A digital data recording and reproduction apparatus comprising: an A/D converter (2) for converting an analogue input signal having a field frequency associated therewith into a digital data signal having a sampling frequency associated therewith; an encoder (14) for adding an error correction code to said digital data signal to generate an encoded digital data signal; and means (HA, HB) for magnetically recording said encoded digital data signal onto a magnetic tape (T) having at least one track, said means (HA, HB) for magnetically recording having rotational magnetic heads (HA, HB), wherein: said encoder (14) generates said error correction code, said error correction code has a data frame arranged as a two-dimensional array having a preselected size, said array size including at least a first word number and a second word number, each of said first and second word numbers being an integral value determined by said sampling frequency of said digital data signal divided by said field frequency; said data frame has a first plurality of blocks and a second plurality of blocks, said first plurality of blocks comprises a pulse code modulated audio data area and said second plurality of blocks comprises a header area, said header area being composed of a synchronization signal and auxiliary data; said auxiliary data comprise an error code data signal and a redundant code, said error code data signal being a first error code data signal or a second error code data signal; and said redundant code indicates the error code data signal selected, and said redundant code has a syndrome pattern associated therewith to distinguish said error code data signal selected.

Claim 9

A digital data recording and reproduction apparatus, comprising: an A/D converter (2) for converting an analogue input signal having a field frequency associated therewith into a digital data signal having a sampling frequency associated therewith; an encoder (14) for adding an error correction code to said digital data signal, said encoder (14) generating an encoded digital data signal; and means (HA, HB) for magnetically recording said encoded digital data signal onto a magnetic tape (T) having at least one track, said means (HA, HB) for magnetically recording having rotational magnetic heads (HA, HB); said encoder (14) having a data frame arranged as a two-dimensional array having a preselected size, said array size including at least a first word number and second word number, said first and second word numbers being an integral value determined by said sampling frequency of said digital data signal divided by said field frequency; said two-dimensional array having a vertical direction and a horizontal direction and comprising a plurality of digital data information signals, a first error detection code encoded in the vertical direction to form a first redundant code, a second error detection code encoded in the horizontal direction to form a second redundant code, and a header comprised of a synchronization signal and an auxiliary data signal; said auxiliary data signal comprising a third redundant code and an error code selected from a first error code data signal and a second error code data signal; said first error code data signal is encoded with said first error detection when said auxiliary data signal comprises said first error code data signal and said second error code data signal is encoded with said first error detection code and said second error detection code when said auxiliary data signal comprises said second error code data signal; and said third redundant code has a syndrome pattern associated therewith, said syndrome pattern indicating which of said first error code date signal and said second error code data signal is comprised in said auxiliary data signal.

Claim 10

A digital data recording and reproduction apparatus, comprising: an A/D converter (2) for converting an analogue input signal having a field frequency associated therewith into a digital data signal having a sampling frequency associated therewith; an encoder (14) for adding an error correction code to said digital data signal, said encoder (14) generating an encoded digital data signal; and means (HA, HB) for magnetically recording said encoded digital data signal onto a magnetic tape (T) having at least one track, said means (HA, HB) for magnetically recording having rotational magnetic heads (HA, HB); said encoder (14) having a data frame arranged as a two-dimensional array having a preselected size, said array size including at least a first word number and second word number, said first and second word numbers being an integral value determined by said sampling frequency of said digital data signal divided by said field frequency; said two-dimensional array having a vertical direction and a horizontal direction and comprising a plurality of digital data information signals, a first error detection code encoded in the vertical direction to form a first redundant code, a second error detection code encoded in the horizontal direction to form a second redundant code, and a header comprised of a synchronization signal and an auxiliary data signal; said auxiliary data signal comprising a third redundant code and an error code selected from a first error code data signal and a second error code data signal; said first error code data signal is encoded with said first error detection when said auxiliary data signal comprises said first error code data signal and said second error code data signal is encoded with said first error detection code and said second error detection code when said auxiliary data signal comprises said second error code data signal; and said third redundant code has a syndrome pattern associated therewith, said syndrome pattern indicating which of said first error code date signal and said second error code data signal is comprised in said auxiliary data signal.

Claim 11

Apparatus according to claim 5 or claim 6 wherein said first error code data signal forming said auxiliary data is an address signal, and said second error code data signal is a sub-code or said second redundant code.

Claim 12

Apparatus according to claim 5 or claim 6 wherein said first error code data signal forming said auxiliary data is an address signal, and said second error code data is a sub-code, a digital audio information signal, or said second redundant code.

Claim 13

Apparatus according to claim 5 or claim 6 wherein said digital data are an audio information signal, and further comprising: means (5, 6) for compressing said audio information signal to generate a compressed audio information signal; and wherein: said means (HA, HB) for magnetically recording sequentially records said compressed audio information signal and said video signal onto one of said tracks of said magnetic tape (T).

Claim 14

Apparatus according to claim 9 wherein said video signal is an NTSC colour television signal, said sampling frequency is 48 kHz, and said first word number and said second word number are 800 to 801, respectively.

Claim 15

Apparatus according to claim 5 or claim 6 wherein said syndrome pattern is a sequence of zero bits when no error exists in said header.

Claim 16

Apparatus according to claim 5 or claim 6 wherein said syndrome pattern is a sequence of one bits when no error exists in said header.