Multi-channel HDTV system

A television system comprising

• a first filter bank comprising first and second finite impulse response filters with finite precision filter coefficients, said first filter being a low pass filter with a substantially diamond-shaped pass band and said second filter being a high pass filter with a substantially diamond-shaped stop band,
• said first filter bank receiving a high resolution video sequence in a two-dimensional vertical-time representation and producing first and second low resolution video sequences in a vertical-time representation,
• said first low resolution video sequence being capable of forming a low resolution television image on a low resolution television receiver, and
• means for recombining said first and second low resolution video sequences, said recombining means comprising a second filter bank including third and fourth finite impulse response filters with finite precision filter coefficients to substantially perfectly reconstruct said high resolution sequence in said two-dimensional vertical-time representation for use by a high resolution television receiver, said third filter being a low pass filter with a substantially diamond-shaped pass band and said fourth filter being a high pass filter with a substantially diamond-shaped stop band,
• wherein the transfer functions of said first, second, third, and fourth filters are in two-dimensional form and are dimensionally non-separable.

A television signal receiving system comprising

• a synthesis filter bank comprising first and second finite impulse response filters with finite precision filter coefficients, said first filter being a low pass filter with a substantially diamond-shaped pass band and said second filter being a high pass filter with a substantially diamond-shaped stop band,
• said first filter receiving and filtering a first low resolution low frequency video sequence in a two-dimensional vertical-time representation to form a first output sequence in a vertical-time representation,
• said second filter receiving and filtering a second low resolution high frequency video sequence in a two-dimensional vertical-time representation to form a second output sequence in a vertical-time representation,
• said first and second low resolution video sequences being formed as result of the decomposition of a single high resolution video sequence,
• said filter bank comprising means for combining said first and second output sequences to perfectly reconstruct said high resolution video sequence and said transfer functions of said first and second filters are two dimensional and dimensionally non-separable.

A television signal transmitting system comprising

• a first filter bank comprising first and second finite impulse response filters with finite precision filter coefficients, said first filter being a low pass filter with a substantially diamond-shaped pass band and said second filter being a high pass filter with a substantially diamond-shaped stop band,
• said first filter bank receiving and decomposing a high resolution progressive video sequence in a multi-dimensional representation to produce an interlaced video sequence and a deinterlacing video sequence,
• said interlaced video sequence being capable of forming a low resolution television image in a low resolution television receiver,
• said interlaced and said deinterlacing video sequences being capable of being recombined by a second filter bank comprising third and fourth finite impulse response filters with finite precision filter coefficients to perfectly reconstruct said high resolution video sequence in said multi-dimensional representation for use by a high resolution television receiver, said third filter being a low pass filter with a substantially diamond-shaped pass band and said fourth filter being a high pass filter with a substantially diamond-shaped stopband,
• wherein the transfer functions of said first, second, third, and fourth filters are multi-dimensional and dimensionally non-separable.