HDTV system with receivers operable at different levels of resolution

Claim 2

A television signal transmission system comprising: means for sub-band coding a wideband video signal characterized by a raster comprising P progressively scanned horizontal lines per frame for providing a plurality of (×N) blocks of spectral coefficients, each of said N×N) blocks representing a respective spatial portion of a frame of said video signal; means for compressing the coefficients of each of said (N× N) blocks; means for transmitting said compressed coefficients; means for receiving said transmitted compressed coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients, where n is less than N by a first selected factor; and display means responsive to said derived pixels for reproducing a video image characterized by a raster comprising p progressively scanned horizontal lines per frame, where p is less than P by a second selected factor, representing sad wideband video signal.

Claim 3

The system of claim 1 wherein said first and second selected factors represent corresponding reductions in resolution.

Claim 4

The system of claim 2 wherein said first and second selected factors equal 2/3.

Claim 5

The system of claim 3 wherein N=9, n=6, P=787.5 and p=525.

Claim 6

The system of claim 5 wherein said wideband video signal is characterized by horizontal and vertical scan rates of about 47.25 KHz and 59.94 Hz respectively and wherein said reproduced video image KHz and 59.94 Hz respectively.

Claim 7

A television signal transmission system comprising: means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal, said sub-band coding means comprising a first set of coding functions used to derive said (N×N) blocks of coefficients; means for compressing the coefficients of each of said (N× N) blocks; means for transmitting said compressed coefficients; means for receiving said transmitted compressed coefficients; processing means comprising a second set of non-inverse decoding functions responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients, where n is less than N by as first selected factor; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal.

Claim 8

A television signal transmission system comprising: means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal, said sub-band coding means comprising a first set of coding functions used to derive said (N×N) blocks of coefficients; means for compressing the coefficients of each of said (N× N) blocks; means for transmitting said compressed coefficients; means for receiving said transmitted compressed coefficients; processing means comprising a second set of non-inverse decoding functions responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients, where n is less than N by as first selected factor; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal.

Claim 9

The system of claim 6 wherein said wideband video signal is characterized by a raster comprising P progressively scanned horizontal lines per frame and wherein said reproduced video image is characterized by a raster comprising p progressively scanned horizontal lines per frame, where p is less than P by a second selected factor.

Claim 10

The system of claim 7 wherein N=9, n=6, P=787.5 and p= 525.

Claim 11

The system of claim 8, wherein said wideband video signal is characterized by horizontal and vertical scan rates of about 47.25 KHz and 59.94 Hz respectively and wherein said reproduced video image is characterized by horizontal and vertical scan rates of about 31.5 KHz and 59.94 Hz respectively.

Claim 12

A television signal transmission system comprising: means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal; means for compressing the coefficients of each of said (N× N) blocks; means for transmitting said compressed coefficients; means for receiving said transmitted compressed coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients, where n is less than N by a first selected factor; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal which is coextensive with a reproduced NTSC image.

Claim 13

A television signal transmission system comprising: means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal; means for compressing the coefficients of each of said (N× N) blocks; means for transmitting said compressed coefficients; means for receiving said transmitted compressed coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients, where n is less than N by a first selected factor; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal which is coextensive with a reproduced NTSC image.

Claim 14

The system of claim 10 wherein said wideband video signal comprises 720 active video lines and wherein said reproduced video image comprises 480 active video lines.

Claim 15

The system of claim 10 including means for adjusting the vertical size of said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 16

The system of claim 10 including means for vertically expanding said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 17

The system of claim 13 wherein said wideband video image comprises 720 active video lines, said reproduced video image comprises 450 active video lines, N=8 and n=5.

Claim 18

The system of claim 10 including means for vertically compressing said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 19

The system of claim 15 wherein said wideband video image comprises 720 active video lines, said reproduced video image comprises 540 active video lines, N=8 and n=6.

Claim 20

A television signal transmission system comprising: means for providing a wideband video signal comprising 787.5 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of about 47.25 KHz and 59.94 Hz respectively; means for sub-band coding said wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal; means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission; means for transmitting said compressed coefficients; means for receiving said transmitted compressed coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal, said video image being coextensive with a reproduced NTSC image and comprising 525 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of about 31.5 HKz and 59.94 Hz respectively.

Claim 21

A television signal transmission system comprising: means for providing a wideband video signal comprising 787.5 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of about 47.25 KHz and 59.94 Hz respectively; means for sub-band coding said wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal; means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission; means for transmitting said compressed coefficients; means for receiving said transmitted compressed coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal, said video image being coextensive with a reproduced NTSC image and comprising 525 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of about 31.5 HKz and 59.94 Hz respectively.

Claim 22

The system of claim 17 wherein said sub-band coding means comprises a first set of N 2 coding functions for deriving said (N× N) coefficient blocks and wherein said processing means comprises a second set of n 2 non-inverse decoding functions for deriving said (n ×n) blocks of video pixels.

Claim 23

The system of claim 18 including means for adjusting the vertical size of said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 24

A television signal transmission system comprising: means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal; means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission; means for transmitting said compressed coefficients; first means for receiving said transmitted coefficients, for deriving therefrom a first block of video pixels of dimension (N×N) corresponding to each of said blocks of coefficients and for producing a high resolution first video image in response thereto; and second means for receiving said transmitted coefficients, for deriving therefrom a second block of video pixels of dimension (n× n) corresponding to each of said blocks of coefficients, where n is less than N by a selected factor, and for producing a second video image in response thereto having less resolution than said first video image.

Claim 25

A television signal transmission system comprising: means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal; means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission; means for transmitting said compressed coefficients; first means for receiving said transmitted coefficients, for deriving therefrom a first block of video pixels of dimension (N×N) corresponding to each of said blocks of coefficients and for producing a high resolution first video image in response thereto; and second means for receiving said transmitted coefficients, for deriving therefrom a second block of video pixels of dimension (n× n) corresponding to each of said blocks of coefficients, where n is less than N by a selected factor, and for producing a second video image in response thereto having less resolution than said first video image.

Claim 26

The system of claim 20 wherein said sub-band coding means comprises a first set of N 2 coding functions for deriving said (N× N) blocks of coefficients, wherein said first means comprises a second set of N 2 inverse decoding functions for deriving said (N×N) block of video pixels and wherein said second means comprises a third set of n 2 non-inverse decoding functions for deriving said (n×n) blocks of video pixels.

Claim 27

The system of claim 21 wherein said wideband video signal and said high resolution video image comprise 787.5 progressively scanned horizontal lines and are characterized by horizontal and vertical periodicities of about 47.25 KHz and 59.94 Hz respectively and wherein said second video image comprises 525 progressively scanned horizontal lines and is characterized by horizontal and vertical periodicities of about 31.5 KHz and 59.94 Hz respectively.

Claim 28

The system of claim 22 wherein said second means comprises means for producing said second video image coextensively with a reproduced NTSC image.

Claim 29

The system of claim 23 wherein said wideband video image comprises 720 active video lines, said second image comprises 480 active video lines, N=9 and n=6.

Claim 30

The system of claim 23 wherein said wideband video image comprises 720 active video lines, said second image comprises 450 active video lines, N=8 and n=5, and including means for vertically expanding said second video image for providing a display coextensive with a reproduced NTSC image.

Claim 31

The system of claim 23 wherein said wideband video signal comprises 720 active video lines, said second image comprises 540 active video lines, N=8 and n=6, and including means for vertically compressing said second video image for providing a display coextensive with a reproduced NTSC image.

Claim 32

In a television signal transmission system of the type including means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N ×N) blocks representing a respective spatial portion of a frame of said video signal, means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission and means for transmitting said compressed coefficients, a television signal receiver comprising: means for receiving said compressed transmitted coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients, where n is less than N by a selected factor; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal.

Claim 33

In a television signal transmission system of the type including means for sub-band coding a wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N ×N) blocks representing a respective spatial portion of a frame of said video signal, means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission and means for transmitting said compressed coefficients, a television signal receiver comprising: means for receiving said compressed transmitted coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients, where n is less than N by a selected factor; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal.

Claim 34

The receiver of claim 27 wherein said wideband video signal is characterized by a raster comprising P progressively scanned horizontal lines per frame and wherein said reproduced video image is characterized by a raster comprising p progressively scanned horizontal lines per frame, where p is less than P by a second selected factor.

Claim 35

The receiver of claim 28 wherein said first and second selected factors represent corresponding reductions in resolution.

Claim 36

The receiver of claim 29 wherein said first and second selected factors equal 2/3.

Claim 37

The receiver of claim 30 wherein N=9, n=6, P=787.5 and p =525.

Claim 38

The receiver of claim 31 wherein said wideband video signal is characterized by horizontal and vertical scan rates of about 47.25 KHz and 59.94 Hz respectively and wherein said reproduced video image is characterized by horizontal and vertical scan rates of about 31.5 KHz and 59.94 Hz respectively.

Claim 39

The receiver of claim 28 wherein said sub-band coding means comprises a first set of coding functions used to derive said (N×N) blocks of coefficients and wherein said processing means comprises a second set of non-inverse decoding functions for deriving said (n× n) blocks of video pixels.

Claim 40

The receiver of claim 33 wherein said wideband video signal is characterized by a raster comprising P progressively scanned horizontal lines per frame and wherein said reproduced video image is characterized by a raster comprising p progressively scanned horizontal lines per frame, where p is less than P by a second selector factor.

Claim 41

The receiver of claim 34 wherein N=9, n=6, P=787.5 and p= 525.

Claim 42

The receiver of claim 35 wherein said wideband video signal is characterized by horizontal and vertical scan rates of about 47.25 KHz and 59.94 Hz respectively and wherein said reproduced video image is characterized by horizontal and vertical scan rates of about 31.5 KHz and 59.94 Hz respectively.

Claim 43

The receiver of claim 27 wherein said display means comprises means responsive to said derived pixels for reproducing a video image representing said wideband video signal which is coextensive with a reproduced NTSC image.

Claim 44

The receiver of claim 37 wherein said wideband video signal comprises 720 active video lines and wherein said reproduced video image comprises 480 active video lines.

Claim 45

The receiver of claim 37 including means for adjusting the vertical size of said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 46

The receiver of claim 37 including means for vertically expanding said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 47

The receiver of claim 40 wherein said wideband video image comprises 720 active video lines, said reproduced video image comprises 450 active video lines, N=8 and n=5.

Claim 48

The receiver of claim 37 including means for vertically compressing said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 49

The receiver of claim 42 wherein said wideband video image comprises 720 active video lines, said reproduced video image comprises 540 active video lines, N=8 and n=6.

Claim 50

In a television signal transmission system of the type including means for providing a wideband video signal comprising 787.5 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of about 47.25 KHz and 59.94 Hz respectively, means for sub-band coding said wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal, means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission and means for transmitting said compressed coefficients, a television signal receiver comprising: means for receiving said compressed transmitted coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal, said video image being coextensive with a reproduced NTSC image and comprising 525 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of 31.5 KHz and 59.94 Hz respectively.

Claim 51

In a television signal transmission system of the type including means for providing a wideband video signal comprising 787.5 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of about 47.25 KHz and 59.94 Hz respectively, means for sub-band coding said wideband video signal for providing a plurality of (N×N) blocks of spectral coefficients, each of said (N×N) blocks representing a respective spatial portion of a frame of said video signal, means for compressing the coefficients of each of said (N×N) blocks for reducing the bandwidth required for their transmission and means for transmitting said compressed coefficients, a television signal receiver comprising: means for receiving said compressed transmitted coefficients; processing means responsive to said received coefficients for deriving a block of video pixels of dimension (n×n) corresponding to each of said blocks of coefficients; and display means responsive to said derived pixels for reproducing a video image representing said wideband video signal, said video image being coextensive with a reproduced NTSC image and comprising 525 progressively scanned horizontal lines per frame and having horizontal and vertical periodicities of 31.5 KHz and 59.94 Hz respectively.

Claim 52

The receiver of claim 44 wherein said sub-band coding means comprises a first set of N 2 coding functions for deriving said (N× N) blocks of coefficients and wherein said processing means comprises a second set of n 2 non-inverse decoding functions for deriving said (n×n) blocks of video pixels.

Claim 53

The receiver of claim 45 wherein said wideband video image comprises 720 active video lines, said reproduced video image comprises 480 active video lines, N=9 and n=6.

Claim 54

The receiver of claim 45 including means for adjusting the vertical size of said reproduced video image for providing a display coextensive with a reproduced NTSC image.

Claim 55

The receiver of claim 47 wherein said wideband video image comprises 720 active video lines, said reproduced video image comprises 450 active video lines, N=8 and n=5, and including means for vertically expanding said second video image for providing a display coextensive with a reproduced NTSC image.

Claim 56

The receiver of claim 47 wherein said wideband video signal comprises 720 active video lines, said reproduced video image comprises 540 active video lines, N=8 and n=6, and including means for vertically compressing said second video image for providing a display coextensive with a reproduced NTSC image.