Television signal transmission processing apparatus and reception processing apparatus

Claim 2

A television signal transmission processing apparatus for transmitting a main signal of M (M: a natural number) scanning lines [per frame] for a vertically central portion of a screen, the main signal being obtained by converting a progressive scanning signal having N (N: a natural number) scanning lines [per frame] into a television signal having the M scanning lines, and for transmitting an augment signal of (N - M) scanning lines [per frame] for upper and lower side portions of the screen, comprising: means (101, 102, 103) for obtaining an interframe sum output and an interframe difference output from the progressive scanning signals comprising the N scanning lines [per frame] by interframe sum average calculation and by interframe difference average calculation, respectively, in units of two frames; first converting means (104, 105, 107, 108) for limiting a spatial frequency band of the interframe sum output in a first band and converting the band-limited output into M scanning lines [per frame]; second converting means (110, 111, 113, 114, 115, 116, 120) for limiting a spatial frequency band of the interframe difference out- put in a second band of a characteristic different from that of the first band and converting the band-limited output into the M scanning lines [per frame]; means (109, 123, 124, 125) for causing sum arithmetic means to receive outputs from said first and second converting means to generate a first frame signal in units of two frames, and causing difference arithmetic means to receive the outputs from said first and second converting means to generate a second frame signal in units of two frames; and means (126, 127, 128, 129, 130, 131) for transmitting the first and second frame signals as an interlace scanning signal of the M [per frame] scanning lines for the central portion of the screen.

Claim 3

In an apparatus for converting an interlace scanning signal, including a main signal of M scanning lines [per frame] for a vertically central portion of a screen and an augment signal of not more than (N - M) scanning lines [per frame] for upper and lower side portions of the screen, into a progressive scanning signal of N scanning lines [per frame], a television signal receiving apparatus comprising: means (201, 202, 203) for obtaining a first progressive scanning signal of the M [per frame] scanning lines by superposing fields of the interlace scanning signal; first converting means (211, 212, 213, 215) for converting the augment signal of not more than the (N - M) lines [per frame] into the signal of the M scanning lines [per frame]; removing means (218, 219, 205) for frequency-shifting a signal output from said first converting means to a vertical high-frequency region, and adding the shifted signal to the first progressive scanning signal, thereby removing a mixed non-required moving image signal; and means (206, 233, 234, 235, 236, 237, 238) for converting a signal obtained by said removing means into a signal of the N scanning lines, thereby converting the signal into the progressive scanning signal of the N scanning lines [per frame] having the same frame frequency as that of a signal on a transmission side.

Claim 4

In an apparatus for converting an interlace scanning signal, including a main signal of M scanning lines [per frame] for a vertically central portion of a screen and an augment signal of not more than (N - M) scanning lines [per frame] for upper and lower side portions of the screen, into a progressive scanning signal of N scanning lines [per frame], a television signal receiving apparatus comprising: means (201, 202, 203) for obtaining a first progressive scanning signal of the M [per frame] scanning lines by superposing fields of the interlace scanning signal; first converting means (211, 212, 213, 215) for converting the augment signal of not more than the (N - M) lines [per frame] into the signal of the M scanning lines [per frame]; removing means (218, 219, 205) for frequency-shifting a signal output from said first converting means to a vertical high-frequency region, and adding the shifted signal to the first progressive scanning signal, thereby removing a mixed non-required moving image signal; and means (206, 233, 234, 235, 236, 237, 238) for converting a signal obtained by said removing means into a signal of the N scanning lines, thereby converting the signal into the progressive scanning signal of the N scanning lines [per frame] having the same frame frequency as that of a signal on a transmission side.

Claim 5

A television signal transmission processing apparatus for transmitting a main signal of M (M: a natural number) scanning lines [per frame] for a vertically central portion of a screen, the main signal being obtained by converting a progressive scanning signal having N (N: a natural number) scanning lines [per frame] into a television signal having the M scanning lines, and for transmitting an augment signal of (N - M) scanning lines [per frame] for upper and lower side portions of the screen, comprising: means (101, 102, 103) for obtaining an interframe sum output and an interframe difference output from the progressive scanning signals comprising the N scanning lines [per frame] by interframe sum average calculation and by interframe difference average calculation, respectively, in units of two frames; first band-limiting means (107) for limiting a spatial frequency band of the interframe sum output; second band-limiting means (113, 115) for limiting a spatial frequency band of the interframe difference output with a characteristic different from that of said first band-limiting means; first scanning line converting means (108) for converting an output from said first band-limiting means into the M scanning lines [per frame]; second scanning line converting means (120) for converting an output from said second band-limiting means into the M scanning lines [per frame]; means (109, 123, 124) for causing sum arithmetic means to receive outputs from said first and second scanning line converting means to generate a first frame signal in units of two frames; means (109, 123, 125) for causing difference arithmetic means to receive the outputs from said first and second scanning line converting means to generate a second frame signal in units of two frames; means (126, 127, 128, 129, 130, 131) for transmitting the first and second frame signals as an interlace scanning signal of M scanning lines [per frame] for the central portion of the screen; third scanning line converting means (147) for converting an output from said second band-limiting means into the (N - M) scanning lines [per frame]; and means (148, 149, 150, 151) for transmitting an output from said third scanning line converting means as the augment signal of the (N - M) interlace scanning lines [per frame] for the upper and lower side portions of the screen.

Claim 6

A television signal transmission processing apparatus for transmitting a main signal of M (M: a natural number) scanning lines [per frame] for a vertically central portion of a screen, the main signal being obtained by converting a progressive scanning signal having N (N: a natural number) scanning lines [per frame] into a television signal having the M scanning lines, and for transmitting an augment signal of (N - M) scanning lines [per frame] for upper and lower side portions of the screen, comprising: means (101, 102, 103) for obtaining an interframe sum output and an interframe difference output from the progressive scanning signals comprising the N scanning lines [per frame] by interframe sum average calculation and by interframe difference average calculation, respectively, in units of two frames; first band-limiting means (107) for limiting a spatial frequency band of the interframe sum output; second band-limiting means (113, 115) for limiting a spatial frequency band of the interframe difference output with a characteristic different from that of said first band-limiting means; first scanning line converting means (108) for converting an output from said first band-limiting means into the M scanning lines [per frame]; second scanning line converting means (120) for converting an output from said second band-limiting means into the M scanning lines [per frame]; means (109, 123, 124) for causing sum arithmetic means to receive outputs from said first and second scanning line converting means to generate a first frame signal in units of two frames; means (109, 123, 125) for causing difference arithmetic means to receive the outputs from said first and second scanning line converting means to generate a second frame signal in units of two frames; means (126, 127, 128, 129, 130, 131) for transmitting the first and second frame signals as an interlace scanning signal of M scanning lines [per frame] for the central portion of the screen; third scanning line converting means (147) for converting an output from said second band-limiting means into the (N - M) scanning lines [per frame]; and means (148, 149, 150, 151) for transmitting an output from said third scanning line converting means as the augment signal of the (N - M) interlace scanning lines [per frame] for the upper and lower side portions of the screen.

Claim 7

In an apparatus for converting an interlace scanning signal, including a main signal of M scanning lines [per frame] for a vertically central portion of a screen and an augment signal of not more than (N - M) scanning lines [per frame] for upper and lower side portions of the screen, into a progressive scanning signal of N scanning lines [per frame], a television signal receiving apparatus comprising: means (201, 202, 203) for obtaining a first sequential scanning signal of the M [per frame] scanning lines by superposing fields of the interlace scanning signal; first scanning line converting means (215) for converting the signal of not more than the (N - M) scanning lines [per frame] into a signal of the M scanning lines [per frame]; means (218, 219, 205) for frequency-shifting the signal output from said first scanning line converting means to a vertical high-frequency region, and adding the shifted signal to the first progressive scanning signal, thereby removing a mixed non-required moving image signal; second scanning line converting means (206) for converting a signal obtained by said removing means into a signal of the N scanning lines; third scanning line converting means (216, 222, 223, 224) for converting the signal of not more than the (N - M) scanning lines [per frame] into a signal of the N scanning lines; and means (226, 227, 231, 232, 233, 234, 235, 236, 237, 238) for frequency-shifting the signal obtained by said third scanning line converting means to a temporary high-frequency region and adding the shifted signal to the signal obtained by said second scanning line converting means, thereby converting the signal to the progressive scanning signal of the N scanning lines [per frame] having the same frame frequency as that of an original signal on the transmission side.

Claim 8

In an apparatus for converting an interlace scanning signal, including a main signal of M scanning lines [per frame] for a vertically central portion of a screen and an augment signal of not more than (N - M) scanning lines [per frame] for upper and lower side portions of the screen, into a progressive scanning signal of N scanning lines [per frame], a television signal receiving apparatus comprising: means (201, 202, 203) for obtaining a first sequential scanning signal of the M [per frame] scanning lines by superposing fields of the interlace scanning signal; first scanning line converting means (215) for converting the signal of not more than the (N - M) scanning lines [per frame] into a signal of the M scanning lines [per frame]; means (218, 219, 205) for frequency-shifting the signal output from said first scanning line converting means to a vertical high-frequency region, and adding the shifted signal to the first progressive scanning signal, thereby removing a mixed non-required moving image signal; second scanning line converting means (206) for converting a signal obtained by said removing means into a signal of the N scanning lines; third scanning line converting means (216, 222, 223, 224) for converting the signal of not more than the (N - M) scanning lines [per frame] into a signal of the N scanning lines; and means (226, 227, 231, 232, 233, 234, 235, 236, 237, 238) for frequency-shifting the signal obtained by said third scanning line converting means to a temporary high-frequency region and adding the shifted signal to the signal obtained by said second scanning line converting means, thereby converting the signal to the progressive scanning signal of the N scanning lines [per frame] having the same frame frequency as that of an original signal on the transmission side.

Claim 9

In an apparatus for converting an interlace scanning signal, including a main signal of M scanning lines [per frame] for a vertically central portion of a screen and an augment signal of not more than (N - M) scanning lines [per frame] for upper and lower side portions of the screen, into a progressive scanning signal of N scanning lines [per frame], a television signal receiving apparatus comprising: means (201, 202, 203) for obtaining a first progressive scanning signal of the M [per frame] scanning lines by superposing fields of the interlace scanning signal; first scanning line converting means (215) for converting the signal of not more than the (N - M) scanning lines [per frame] into a signal of the M scanning lines [per frame]; means (218, 219, 205) for frequency-shifting the signal output from said first scanning line converting means to a vertical high-frequency region, and adding the shifted signal to the first progressive scanning signal, thereby removing a mixed non-required moving image signal; second scanning line converting means (216) for converting a signal obtained by said removing means into a signal of the N scanning lines; third scanning line converting means (216, 222, 223, 224) for converting the signal of not more than the (N - M) lines [per frame] into a signal of the N scanning lines; first adding means (225, 231) for adding a noninverted output of the signal obtained by said third scanning line converting means to the signal obtained by said second scanning line converting means; second adding means (226, 227, 232) for adding an inverted output of the signal obtained by said third scanning line converting means to the signal obtained by said second scanning line converting means; and means (233, 234, 235, 236, 237, 238) for converting signals obtained by said first and second adding means into a double-speed progressive scanning signal of the N scanning lines [per frame].

Claim 10

In an apparatus for converting an interlace scanning signal, including a main signal of M scanning lines [per frame] for a vertically central portion of a screen and an augment signal of not more than (N - M) scanning lines [per frame] for upper and lower side portions of the screen, into a progressive scanning signal of N scanning lines [per frame], a television signal receiving apparatus comprising: means (201, 202, 203) for obtaining a first progressive scanning signal of the M [per frame] scanning lines by superposing fields of the interlace scanning signal; first scanning line converting means (215) for converting the signal of not more than the (N - M) scanning lines [per frame] into a signal of the M scanning lines [per frame]; means (218, 219, 205) for frequency-shifting the signal output from said first scanning line converting means to a vertical high-frequency region, and adding the shifted signal to the first progressive scanning signal, thereby removing a mixed non-required moving image signal; second scanning line converting means (216) for converting a signal obtained by said removing means into a signal of the N scanning lines; third scanning line converting means (216, 222, 223, 224) for converting the signal of not more than the (N - M) lines [per frame] into a signal of the N scanning lines; first adding means (225, 231) for adding a noninverted output of the signal obtained by said third scanning line converting means to the signal obtained by said second scanning line converting means; second adding means (226, 227, 232) for adding an inverted output of the signal obtained by said third scanning line converting means to the signal obtained by said second scanning line converting means; and means (233, 234, 235, 236, 237, 238) for converting signals obtained by said first and second adding means into a double-speed progressive scanning signal of the N scanning lines [per frame].

Claim 11

An apparatus according to claim 3, characterized in that said second band-limiting means comprises means (112, 113) for obtaining first and second band signals by dividing a vertical frequency band into two bands; and said third scanning line converting means comprises means (114, 115, 116, 141, 142, 143) for time-compressing the first and second band signals on first and second half portions, respectively, thereof in the horizontal direction, thereby obtaining a signal multiplexed in a time division manner in the horizontal direction and means (147) for converting a scanning line count of the multiplexed signal from said time-compressing means.

Claim 12

An apparatus according to claim 1, characterized in that said first band-limiting means comprises means (107, 106) for outputting a high-frequency component of a vertical frequency band; and said third scanning line converting means comprises means (141, 142, 143) for obtaining first and second band signals by dividing the vertical frequency band into two bands, and time-compressing the first and second band signals on first and second half portions, respectively, thereof in the horizontal direction, thereby obtaining a signal multiplexed in the time division manner in the horizontal direction, motion detecting means (145) for receiving an output from said obtaining means, means (146) for selectively outputting the high-frequency component of the vertical frequency band and the time-division multiplexed signal in response to a motion detection signal from said detecting means, and means (147) for converting a scanning line count of a signal obtained by said selective outputting means.

Claim 13

An apparatus according to claim 5, characterized in that said means for converting the signal of not more than the (N - M) scanning lines [per frame] into the signal of the M scanning lines comprises: means (213) for separating the signal of not more than the (N - M) scanning lines [per frame] of the first progressive scanning signal in the horizontal direction on a time base and expanding one of the separated components by one horizontal period on a time base, thereby deriving a first expansion signal; and means (215) for converting the first expansion signal derived by said deriving signal into the signal of the M scanning lines.

Claim 14

An apparatus according to claim 8, characterized in that said means for converting the signal of the (N - M) scanning lines [per frame] into the signal of the N scanning lines comprises: means (214) for deriving a second expansion signal by expanding by one horizontal period the other of the separated components obtained by time-divisionally separating the signal of the (N - M) scanning lines [per frame] of the first progressive scanning signal in the horizontal direction on a time base; and means (216, 222, 224) for converting each of the second and first expansion signals into a signal of the N scanning lines of obtained by synthesis and synthesizing the signals each having the N scanning lines, thereby obtaining a synthesized signal.

Claim 15

An apparatus according to claim 9, characterized in that said means for converting the signal of the (N - M) scanning lines [per frame] into the signal of the N scanning lines comprises: means (223) for directly converting the signal of the (N - M) scanning lines [per frame] of the first progressive scanning signal into the signal of the N scanning lines; means (228) for performing motion detection by using the synthesized signal, thus obtaining a motion detection signal; and means (225, 227) for selectively outputting one of the directly obtained signal of the N scanning lines and the synthesized signal of the N scanning lines in accordance with the motion detection signal.

Claim 16

An apparatus according to claim 10, characterized in that said means for converting the signal of the (N - M) scanning lines [per frame] into the signal of the N scanning lines comprises a multiplier (217) for multiplying a conversion output thereof by a coefficient, the motion detection signal is also supplied to said multiplier, and the coefficient is increased when the image is a moving image.

Claim 17

An apparatus according to claim 10, characterized in that said means for selectively outputting one of the directly obtained signal of the N scanning lines and the synthesized signal of the N scanning lines in accordance with the motion detection signal comprises a first switching circuit (225) for receiving a non-inverted output of the synthesized signal at one input terminal thereof and the directly obtained signal of the N scanning lines at the other input terminal thereof, and a second switching circuit (227) for receiving an inverted output of the synthesized signal at one input terminal thereof and the directly obtained signal of the N scanning lines at the other input terminal thereof, wherein outputs from said first and second switching circuits are supplied to said first and second adding means (231, 232), respectively.

Claim 18

An apparatus according to claim 9, characterized in that said means for converting the signal of the (N - M) scanning lines [per frame] into the signal of the N scanning lines comprises: means (223) for converting the signal of the (N - M) scanning lines [per frame] directly into the signal of the N scanning lines; means (241) for frequency-shifting the scanning signal obtained by said converting means; means (228) for performing motion detection by using the synthesized signal, thereby obtaining a motion detection signal; and means (225, 227) for selectively outputting one of the signal of the N scanning lines obtained by frequency shifting and the synthesized signal of the N scanning lines obtained by synthesis in accordance with the motion detection signal.

Claim 19

An apparatus according to claim 5, characterized in that said means for converting the signals obtained by said first and second adding means into the double-speed progressive scanning signal of the N scanning lines [per frame] comprises: means (236) for compressing a horizontal period of the signal obtained by said first adding means (231) to 1/2 on a time base; means (235) for inputting the signal obtained by said second adding means (232) into a line memory, and adding signals at input and output sides of said line memory, thereby obtaining an average signal thereof; second time compressing means (237) for delaying the average signal by one field, thereby compressing the horizontal period to 1/2 on the time base; and means (238) for selecting and outputting outputs from said first and second time compressing means in units of frames.