JPH03505656A - High-definition widescreen television system with multiple signal transmission channels - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] High-definition widescreen television system using multiple signal transmission channels Background of the invention The present invention provides one or more signals for transmitting signals representing high definition widescreen images. The present invention relates to a television signal transmission system that utilizes a transmission channel.

A typical television receiver, for example one that follows the NTSC broadcast standard, has a 4:3 It has an aspect ratio (width to height ratio of the displayed image). Recently 2 vs. 1.16 vs. 9 again allows higher aspect ratios, such as 5:3, to be used in television reception systems. There is growing interest in. The reason is that such a high aspect ratio This is because the aspect ratio is closer to that of the human eye than the aspect ratio. Aspect ratio is 5 3:3 and 16:9 video images are close to the aspect ratio of movie film, so It is receiving particular attention. In addition, the resolution of the reproduced image can be adjusted to the resolution of an ordinary television image. There is a growing interest in increasing the definition of images closer to that of movie film. death However, a television program that transmits a signal representing a high-definition widescreen image The system delivers a video signal that is compatible with existing television receivers. should be designed accordingly. Is it difficult to widely adopt incompatible systems? It is et al.

Regarding several proposed high-definition widescreen television systems The survey was published in IEE Transactions, February 1988. ・On Consumer Electronics (IEEE T+ansacjion) s on Consume+ Eicc+ronics) Pages 1 to 15 [Advanced Television System J] Robert Hopkins entitled Lewision S7sS75le This can be seen in the paper by John Hopkins. stated in this paper Of the eight systems available, five are compatible with current NTSC television receivers. The transmitted signal is normally processed without any pre-processing by a converter. The 4:3 image produced can be received by standard NTSC receivers, and the 4:3 image produced is standard NTSC receiver. This is only slightly degraded compared to the SC image. These systems The systems were developed by AT&T Bell Laboratories (Bell Method) and the New York Institute of Technology. Dr. William Glenn (Glenn method), Mr. Del Rey's group (Del-Ray method) North American Phillips (NAP method), and NBC and David Sur It is a consortium of Nof Research Center (NBC method).

In the bell system, two 6MII! High-definition video using television channels transmits a signal representing an image of the screen. The first channel is a high-definition Relatively low frequency luminance and chrominance signal components of a screened image It transmits a standard NTSC signal representing the minute.

The second channel has a special Transmits high frequency luminance and chrominance signals used by the receiver do.

The Glenn method also uses two channels, one of which carries an NTSC-compatible signal. send The second channel in the Glenn system has a bandwidth of 3MHI out of 6MHI. by filtering out the fine details of the image and reducing its temporal resolution (i.e. , lower its frame frequency) and transmit. Using frame memory, this low A frame frequency high-definition signal and an NTSC signal are combined. In the Glenn method, By increasing the direct blanking period and decreasing the horizontal blanking period, the wide A screen effect is achieved.

In the Del Rey method, 6MH! NTSC compatible credentials using only one channel transmit the number. This signal shows a high definition image over a period of 6 fields. high To reconstruct a high-definition image, a special receiver uses these 6 images in frame memory. Combine fields. Even with the Del Rey method, the vertical retrace period can be increased to increase the width. Achieve a clean effect.

In the NAP system, standard NTSC signals are transmitted on one channel and mentslion) signal on the second channel. The additional signal is a special image receiver. is combined with an NTSC-compatible signal by the machine to produce a widescreen progressively scanned image. live. The horizontal details of images produced by the NAP method are similar to those of NTSC images. They are qualitatively the same.

The NBC system is the starting point for the invention described below. This method was introduced in February 1988. IE Transactions on Consumer Issued in Ma electronics (IEEE T+xnsaction+ on Cons The chairs published on pages 111 to 120 of umer Electronics) Nade 4 (M, l5nar+li) in rACTV system by private land Decoding problems in the AC It is described in more detail in the paper entitled TVS7stem). Part of this method "Widescreen Television System" granted on November 1, 1988. U.S. Patent No. 4°782 titled “Apparatus for Processing Radio Frequency Information in a System” ．． It is also mentioned in No. 383. These references are referenced in this application . The methods described in the papers and patent applications referenced in this application are 6 MHI channels. A single channel is used to transmit the enhanced NTSC signal. This signal can be used as a normal NT When processed in an SC receiver, a normal television image is produced. however When this signal is processed by a receiver that decodes and synthesizes various component signals, it produces a high-quality image. A widescreen image is generated. The component signal that enhances the basic NTSC signal is , allocated to an underutilized portion of the NTSC spectrum.

This high-definition widescreen image is more horizontal and High definition in the vertical direction and overall very easy to see for the viewer, but diagonal The definition is relatively low. Furthermore, the overall definition is lower than that of motion picture film. stomach.

Summary of the invention Therefore, with the NBC method, the definition of reproduced images is almost comparable to that of movie film. It is desirable to provide an auxiliary signal that increases as much as possible.

The present invention generates a signal representing a high definition widescreen image and divides this signal into two The system is implemented as a system that transmits on one television channel. movie fi An input video signal representing an image with approximately the same definition as the frame is provided to the system. be provided. The system includes a first signal encoder, the encoder having an input Processes a portion of a video signal to produce a finer image than the image represented by this input video signal. A symbol that represents an image with a lower degree of definition, but with more definition than an ordinary television image. generate an encoded main video signal. The main video signal is fed to a decoding circuit. revenge The signal circuit generates a baseband signal representing the enhanced definition image. Furthermore This system represents the difference between the input video signal and the decoded baseband signal. It includes a circuit that generates a difference signal. This difference signal is processed by a second signal encoder. ° to generate an auxiliary signal.

The main signal and the auxiliary signal are transmitted through separate television channels.

A receiver embodying the present invention receives and decodes a main signal and an auxiliary signal, and outputs the decoded signal. are combined to produce a signal representing a high-definition widescreen image.

Brief description of the drawing FIG. 1 shows a two-channel television signal transmission system operating in accordance with the present invention. FIG.

Figure 1a shows a single channel engine suitable for use in the system shown in Figure 1. It is a figure explaining operation of a coder.

Figure 1b shows a single channel engine suitable for use in the system shown in Figure 1. FIG. 2 is a block diagram of a coder.

Figures 1c to 1f, Figure 2, Figure 2a, and Figures 3a to 3C are replaced by Figure 1b. 2 is a diagram illustrating the operation of various components of the illustrated single channel encoder; FIG.

FIG. 4 shows a file suitable for use in the single channel encoder shown in FIG. 1b. 1050 (L/F) interlaced to 525 L/F progressive scan converter per frame A block diagram is shown.

Figures 5a and 5b are diagrams for use with the single channel encoder shown in Figure 1b. 1 shows a block diagram of a progressive-to-interlaced converter suitable for

Figures 6-8 illustrate the side-to-center signal separation of the single-signal encoder shown in Figure 1b. 1 is a block diagram of circuitry suitable for use in devices and processors; FIG.

Figure 9 shows the NTSC encoding of the single channel encoder shown in Figure 1b. 1 is a block diagram of a circuit suitable for use as a controller; FIG.

Figures 10 and 10a-10c illustrate the single channel encoder shown in Figure 1b. The various vertical encoders used in the encoder and the single channel encoder shown in Block diagram and chart showing the configuration of the one-time filter and the horizontal-vertical one-time filter. It is the default.

Figures 11a and 11b show the high frequency of the single channel encoder shown in Figure 1b. 1 is a two-block diagram of a circuit suitable for use as a component intra-frame averaging circuit; FIG. .

Figures 12 and 12a-12d illustrate the single channel encoder shown in Figure 1b. block of circuits suitable for use as time expanders or time compressors for use with FIG. 2 is a block diagram and a diagram explaining the operation of this circuit.

FIG. 13 shows a diagram suitable for use in the single channel encoder shown in FIG. 1b. FIG. 2 is a block diagram of an amplitude compensated quadrature modulation circuit.

FIG. 14 is a block diagram of a single channel decoder suitable for use in the present invention. It is a diagram.

15 and 16 are frames of the single channel decoder shown in FIG. 14. 1 is a block diagram of a circuit suitable for use as an inner averaging circuit-differential circuit; FIG.

FIG. 17 shows a straight line suitable for use in the single channel decoder shown in FIG. FIG. 2 is a block diagram of an angular demodulator and amplitude expander.

FIG. 18 shows a routine suitable for use in the single channel decoder shown in FIG. FIG. 2 is a block diagram of a minance/chrominance signal separation circuit.

Figure 19 shows the Y-1-Q format of the single channel decoder shown in Figure 14. - A block diagram of a circuit suitable for use as a decoder.

FIG. 19a shows a format suitable for use in the format decoder shown in FIG. FIG. 2 is a block diagram of a side panel, center panel splicer.

20 and 21 illustrate an interlaced scan circuit suitable for use in the circuit shown in FIG. FIG. 2 is a block diagram of a progressive scan converter.

FIG. 22 shows a diagram for use in the auxiliary channel encoder of the system shown in FIG. FIG. 2 is a block diagram of a suitable auxiliary channel-luminance signal encoder.

FIG. 22a is a pixel diagram useful in explaining the operation of the circuit shown in FIG. Ru.

FIG. 23 shows a diagram suitable for use in the single channel encoder shown in FIG. 1b. FIG. 2 is a block diagram of a motion encoder and a low-pass filter.

Figure 24 shows a diagram for use in the auxiliary channel encoder of the system shown in Figure 1. FIG. 2 is a block diagram of a suitable auxiliary channel chrominance signal encoder.

Figure 24a provides a video feed to help explain the operation of the circuit shown in Figure 24. This is a field diagram.

FIG. 25 shows the auxiliary signal generated by the auxiliary channel encoder shown in FIG. FIG. 2 is a block diagram of an example circuit for modulating and demodulating .

26 and 27 respectively show the advanced compatibility television 2 shown in FIG. Chrominance and luminance addition suitable for use in channel decoders FIG. 2 is a block diagram of a signal decoder.

FIG. 28 shows the auxiliary channel luminance signal encoder shown in FIG. The luminance-added signal decoder shown in Figure 27 is used as a motion signal detector. FIG. 2 is a block diagram of a circuit suitable for .

FIG. 29 shows the advanced compatibility television two-channel decoder shown in FIG. It is a block diagram.

detailed description In the drawings, the arrow lines represent busbars that transmit multi-bit parallel digital signals. or a signal that carries an analog signal or a single-bit digital signal Represents a passage. The type of signal carried by a busbar or signal path is This becomes clear from the content of the text. For clarity, the compensated delay element is It may have been omitted in the passage number. A specialist in the design field of digital signal processing circuits. The vendor must know where such delay elements are needed in a particular system. There is.

FIG. 1 shows a two-channel television signal transmission system including an embodiment of the present invention. It is a block diagram. In FIG. 1, a signal source 110 (e.g., a video camera) broadband widescreen high-definition television (HDTV) signals Y, I and and Q are provided to transmitter 112.

Signal Y is OH! From 20MH! Contains luminance image information that occupies a frequency band up to.

Signals I and Q carry color image information occupying a frequency band from OHz to 10MHz. include.

Signal Y, 1. Q is the type described in Isnadi Minchi's paper and patent application mentioned above. is encoded by a single channel encoder 114 of the formula. The encoded signal is It is then transmitted by antenna 115. Television transmitted by antenna 115 The John signal is received by an antenna 120 associated with a standard NTSC receiver 122. The wide screen high-definition television (EDTV) receiver is received by an antenna 124 associated with a screen EDTV display unit 128. be done. Widescreen HDTV receivers are based on the above-mentioned Isnadi Minchi paper and and a single channel decoder of the type described in the patent application to decode the received signal. and high-definition luminance and chrominance image components YL, 1/, Q/. Signal Y’,! ’, Q’ is a wide screen EDTV display unit. is displayed on the mark 128.

The system shown in FIG. 1 further includes an auxiliary channel encoder 142. Enco The camera 142 is displayed by widescreen EDTV receivers 125 and 128. widescreen EDTV signal provided by signal source 110 and the original widescreen EDTV signal provided by signal source 110. A signal representing the difference from the screen HDTV signal is encoded for transmission. this To generate the difference signal, the output signal provided by single channel decoder 140 is The signals Y', I', and Q' are respectively derived from the signals Y, I, and Q supplied from the signal source 110. Subtract it. Single channel decoder 140 may be the same as decoder 125 . The auxiliary television signal provided by encoder 142 is connected to antenna 130. Sent from.

An auxiliary channel signal transmitted from antenna 130 and an auxiliary channel signal transmitted from antenna 115. The main channel signal that is received by the antenna 132. The system includes a two-channel decoder 134. The decoder 134 decodes the main channel signal and the auxiliary channel signal. The signaled luminance and chrominance signal components are additively combined to generate a wideband signal. A widescreen screen suitable for display on a clean HDTV display unit 136. and generate HDTV component signals Y', I', and Q', respectively.

FIG. 1a illustrates the signal encoding technique used in single channel encoder 114. FIG. The encoder first sets the bandwidth of the HDTV signal to 6.0MH! Below Reduce the HDTV signal to 1050 lines per frame (L/F) from the interlaced scanning type to the progressive scanning type of 525 L/F, and then the resulting The signal is encoded into an NTSC compatible video signal having four signal components.

One component, in an ordinary or standard NTSC television receiver 122, , produces a color image with standard aspect ratio and standard definition, and the other three components are When played back on the light screen EDTV receiver 128, the standard image is emphasized and displayed. do. These three enhancement components correspond to standard aspect ratio and standard definition images. component and occupies the same frequency band as the standard component, but Physically or perceptually hidden within the image produced by imager 122.

The first component signal (i.e., standard component) is a 525L/F12-to-1 interlaced scan signal. It has a standard aspect ratio of 4:3. This component is a band-limited HDTV signal. including the center panel. This signal is time extended and occupies almost the entire active line time. I'm looking forward to it. The first component signal also includes side panel horizontal low frequency information. this The information is the left and right horizontal image overscan areas of the image displayed by a standard NTSC receiver. Time is compressed within the area. This low frequency side panel information is It is not displayed on the aircraft, so it is physically hidden from view. This first component signal For the reasons described below, l, 5MH! within the frame for frequencies greater than or equal to After being averaged, it is combined with the second and third component signals. Figure 2 shows the first component This diagram illustrates the time expansion and compression of the issue.

The second component signal is an auxiliary signal for a two-to-one interlaced scan, in which case the left and right side The channel high frequency information is each expanded to occupy one-half of the effective line time. subordinate Thus, the expanded side panel information substantially occupies the entire active line time of the second component signal. I'm looking forward to it. FIG. 3C illustrates the generation of the second component signal.

The third component signal is a 2:1 interlaced auxiliary signal and is a band-limited HDTV signal. This is what can be obtained from the issue.

The third component signal has approximately 50 to 6.0 MH! High frequency horizontal brightness detail information up to include. This information is reduced in frequency range from 0 to 1. OMH+ band occupies .

The second and third component signals are each intra-frame averaged and amplitude compressed. and then modulate the suppressed alternating subcarrier signals ASC and ASC', which are in quadrature relationship. It is used for The frequency of signals ASC and ASC' is one half of the horizontal scanning frequency. and is within the chrominance band of the NTSC signal spectrum. Also, These alternating subcarrier signals undergo a 180 degree phase change per field. child In this case, one field is defined as a period of 262 horizontal lines. Therefore, it is modulated The distortion of the standard NTSC image caused by the second and third components is determined by the frame frequency Appears as a complementary color change of (308x). This type of distortion is commonly perceived as do not have. The reason is that the human eye cannot reach the saturation levels normally encountered in television signals. This is due to its relative insensitivity to rapid complementary changes in color.

The fourth component signal is a two-to-one interlaced "hellver" signal. "Helva" signal is vertical Contains one hour (VT) luminance detail information. This information is otherwise 525L Lost when converting HDTV signals from PF progressive scan to 525LPF interlaced scan It's something to put away. This helper signal is lost when the HDTV receiver moves. HDTV display unit 128 and HDTV display unit 128 occurs in the progressively scanned widescreen image produced by the TV display unit 136. Reduce or eliminate unwanted flicker or movement. Figure 2a shows 525LPF sequential How is the helper signal generated from the scan and 525LPF interlaced scan signals? It shows how.

The fourth component signal is band limited to 750 kHz and has a portion corresponding to the side panel. mapped to the first component signal by compressing and expanding the part corresponding to the center panel. mapped. The resulting signal is an image carrier signal (video carrier Also known as a signal. ) to modulate a carrier signal that is in quadrature with and combined with the modulated first, second and third components.

The fourth component signal is hidden within the normal NTSC display image. The reason is The distortion caused by the component signal No. 4 is converted to the first component by mapping (mxpping) processing. This is because they are spatially correlated.

The luminance signal part of the first component signal is horizontal-vertical one time (H-V-T) < L The chrominance signal part of the first component signal and the luminance signal are pre-filtered using a shaped filter. Eliminate potential crosstalk with the nonce signal portion. Furthermore, the first, second and third components The component signals are averaged within the frame using a V-T<L type filter, and the first component and Since it substantially eliminates V-T crosstalk between the second and third components, The three component signals are easily separated at the receiver decoder 125,134. 1st d 1e and 1e illustrate a first component signal for generating an encoded NTSC signal, Intra-frame averaging of the second component signal and third component signal and the combination of these components Illustrated.

The comb filter filtration that accompanies the processing steps described above is used for encoding and decoding. Although useful in processing, oblique resolution of the EDTV image shown on display unit 128 There is a tendency to reduce the degree of For frequency spectrum analysis, single channel Sachi Deco The luminance signal Y' generated by the reader is C video frequency spectrum,! , peaks and valleys between 5MHr and 6.0M)lx (i.e. filtered with a comb filter) frequency spectrum of the signal). Frequencies above 6.0MHz are signal Y ’ is not there. Used to reproduce progressive scanning luminance signals from transmitted interlaced scanning signals. Since the helper signal generated is band limited to 750 k) lx, the alternating range of signal During the in-period, 750 kHz and 20 MH! The brightness information between the two is lost.

The color information signal components of the HDTV signal, signals I and Q, are each 600 kHz. g, and then split between the first component signal and the second component signal. child These signals are averaged within the frame as part of the first component signal and the second component signal. Since the regenerated signals I' and Q' undergo VT filtering during exhibits a frequency spectrum with alternating peaks and valleys, which is characteristic of a signal filtered by a router. Ru.

As mentioned earlier, the difference signals ΔY, ΔI and ΔQ are each a single channel signal. 525LPF sequential scanning signals y', i' and Q generated by coder 140 ' is 1050 L/1 supplied from the widescreen HDTV signal source 110 It is obtained by subtracting from the F interlaced scanning signals Y, I and Q, respectively. little At least one field of interlaced scanning signals Y, I, Q and each progressive scanning signal Y', There is a vertical displacement between the lines at the displayed positions from I' and Q', so the difference is Signals ΔY, Δ■, and ΔQ dissipate a significant amount of energy at relatively low frequencies. have

Therefore, the luminance difference signal ΔY is OH! Frequency spectrum ranging from to 20MHr The color difference signals Δ■ and ΔQ are OH! Frequencies ranging from 2QMHr to It has energy in the spectrum. Auxiliary channel encoder as described below. The data processor 142 processes the signals ΔY, ΔI and ΔQ to provide a bandwidth of 6 MH! supplement with Generates an auxiliary video signal.

FIG. 1b shows a wide screen EDTV signal source 110 and a single channel signal source 110. 2 is a block diagram showing details of an encoder 114. FIG. Signals used in embodiments of the invention Source 110 includes a widescreen 1050 LPF interlaced scan camera 10. camera 10 is the frame frequency generated by the studio timing signal generator 11 Synchronized with the encoder 114 by the multi-timing signal FT and the composite synchronization signal ccps. is removed. The camera 10 used in the embodiment of the present invention has 52 It generates 5 lines of video information, or 1050 lines per frame.

In each frame, the lines of one field intersect with the lines of the next field. - Leaving. Although only the 1050L/F camera is shown, the 1050 L/F video tape recorder (VTR) or 1125 L/F interlaced scan camera Alternatively, a VTR can also be used as a signal source for video signals Y, I, and Q. Ru. When using a 1125L/F signal source, crop the 1125L/F image (c It is desirable to reduce the number of lines per frame by Delicious.

The camera 10 used in the embodiment of the present invention is a 525LPF progressive scan camera; The image provided by the camera of conditioned to move in a direction. This image can be moved using Studio Timing. Square wave signal FT of frame frequency (30H2) supplied from the programming signal generator 11 This is done by supplying the centering control device of the camera 10.

In response to a signal FT having one value (e.g., logic 1), The moving camera 10 moves the image downward by one-half of a line period. signal In response to the other value of FT, camera 10 returns the image to its original undisplaced position. Return to The timing of the signal provided by this camera is affected by the movement of the image. Not heard.

The primary color output signals of red, green, and blue (R, G, B) generated by the camera 10 are matrix The matrix 12 converts this primary color signal into a luminance signal YA and a color difference signal. Convert to signals IA and QA. Signals YA, IA and QA are analog digital It is digitized by a digital converter (ADC) 14. ADC14 is a studio clock signal (8×fsc) supplied by the timing signal generator 11. More controlled. The ADC 14 determines the standard NTSC color subcarrier signal frequency (fs Widescreen EDTV signal with a sampling frequency 16 times that of c) Y.

! , Q.

What follows is an overview of the encoding circuit shown in FIG. 1b. Signals Y, I, Q are , 1050 interlaced to 525 progressive scan converter 16. Scan converter 16 The output signals YF11F and QF supplied from the progressive scan to interlaced scan converter 17a , 17b, 17c, and 17a.

17b and 17c generate signals YF', IF', and QF'. Signal YF' , IF', and QF' are each 525LPF interlaced scanning signals. Also scan converter 17c generates the field difference signal YT used to generate the helper signal. . As previously mentioned, the helper signal is sent to single channel decoders 128 and 140. 525 L/F order from the 5 25 L/F interlaced scanning signal that was used and received Next scanning signals Y', I', Q' are generated. Signals YF', IF'.

QF’ is filtered by a low-pass filter and fed to the side/center signal separator/processor 18. It will be done. Separator/processor 18 separates these signals into side panel and center panel sections, respectively. The side panel part is separated into high frequency components and low frequency components, and the side panel signal compresses the low frequency components of the signal and expands the center panel signal. Show expanded center panel signals YE, IE, QE and signals representing the compressed low frequency components of the side panel. YO, IO, QO are combined by side central combiner 28 to produce signals YN, IN, Generate QN. These signals are fed to the NTSC encoder 31, and its output becomes the first component signal C/SL of the single channel HDTV signal mentioned above.

High frequency components YH, IH, QH of both side panels supplied by the separator/processor 18 is supplied to an NTSC encoder 60 whose output signal is time expanded by a circuit 62. be done. The output signal of circuit 62 is the second component of the single channel EDTV signal previously described. minute signal.

The signal YF' provided by the progressive scan to interlaced scan converter 17c is passed through the filter 70. 5.0MH! ~6. OMH! modulator/low-pass filter 7 OMH by 2! ~1. OMH! frequency shifted and format encoded. 74, the time is compressed to match the first component signal of the center panel portion. . The output signal of encoder 74 becomes the third component of the EDTV signal.

The second and third component signals are averaged within the frame by respective circuits 64 and 76. to generate signals X and Z. Signals X and 2 are amplitude compressed and are , are used to modulate two quadrature subcarrier signals ASC and ASC'.

The output signal of circuit 80 is signal M.

The first component signal C/SL is averaged within the frame by a circuit 38 to generate a signal N. Ru. Signals M and N are combined by adder 4o to generate signal NTSCF.

The field difference signal YT generated by the progressive scan to interlaced scan converter 17c is A format encoder 78 provides a format corresponding to the first component signal. It is mapped in time so that The resulting signal is used by the motion encoder and low frequency filter. The signal is supplied to filter 79 to generate a fourth component, ie, a helluva signal YTN.

Signals NTSCF and YTN are connected to respective digital-to-analog converters (DACs) 5 4 and 53, it is converted into an analog signal. The analog switch 58 Receives the composite synchronization signal ocps generated by the studio timing signal generator 11. NTSCF. The signal provided by switch 58 and the analog The helper signal is radio frequency (RF) quadrature modulated to generate the first component television signal. is supplied to a container 57. This signal is transmitted from antenna 115 by transmitter 55. Ru.

What follows is a more detailed description of the circuit shown in FIG. 1b. studio ta The timing signal generator 11 includes a 1050LPF interlaced scanning camera 10 and a 525LPF interlaced scanning camera 10. For the F interlaced scan encoded output signal MA IN, the composite synchronization signal ccps and Supply ocps. Further, the signal generator 11 generates a frequency of the NTSC color subcarrier signal. Clock signals 4Xfsc, 8 with frequencies respectively 4 times, 8 times and 16 times of the number xfse, 16Xfsc, sample data vibration signal ASC, ASC', fc , line frequency signal Fs.

Hl and frame frequency signal FT. The switching signal SW is the signal ocp s into the encoded output signal MAIN. . Circuit 11 is a conventional resonant crystal controlled oscillator that generates a clock signal 16Xfsc. including. The circuit 11 receives 1/2 of the horizontal scanning frequency from the signal 16XfsC. 3.1MH, which is practically equal to 5 times! a quadrature-phase alternating subcarrier signal with a frequency of signals ASC and ASC', and a signal fc having a frequency substantially equal to 5 MHz. occurs. Signal ASC.

To generate ASC' and fc, for example, a counter (Fig. (not shown) and the value of the counter is set to the value of the counter representing these three signals. A read-only memory (ROM) (shown) that is programmed to provide sample values. (without). Additionally, the ROM stores one predetermined value for each horizontal period of the signal NTSCF. Defined pixel sampling time (H) or one group sampling time (Fs) It is also possible to provide an output signal representative of .

One of these signals is the first signal, which occurs at the frame or field frequency. 11a and 11b to provide a signal such as the signal FT described in connection with FIGS. 11a and 11b. It can also be fed to a separate counter (not shown) to be programmed. various clocks An exemplary apparatus for generating clock and timing signals is Video signal synchronization system J (WideOSignal 5) for 7ncbronixpro on S7s+e+++ Is for an EIt Ended　DelinNion　Te1evisian　Title: S7S75te Further details are provided in U.S. Patent Application No. 241.277, which is also incorporated herein by reference. illuminated.

The widescreen HDTV signals Y, I, and Q supplied from the signal source 110 are 10 50 interlaced to 525 progressive scan converter 16, which converts the signals YF, IF , generates QF. Scan converter 16 is part of single channel encoder 114 It is. FIG. 4 is a block diagram illustrating circuitry suitable for use in scan converter 16. be. The circuit shown in FIG. 1. ) for Q.

The other two channels (not shown) are the same as shown and will be described in detail. do not have. This circuit uses a sample gap between samples of a 1050LPF interlaced input signal. Interpolate the values, combine these interpolated samples with non-interpolated samples, Generates a 525LPF progressive scan signal at the output port of the divide by 2 circuit 482 . The interpolated samples generated by scan converter 16 are processed through motion adaptive processing. can be obtained. In the parts of the image that represent motion, the interpolated samples are (i.e., vertically averaged) from samples spaced apart by

In static parts of the image, the interpolated samples are samples one frame period apart. (i.e. averaged over time).

In FIG. 4, the 1050 LPF interlaced scan signal is fed to a horizontal low pass filter 438. be done. Filter 438 continuously scans the 1, 5 x fs c signals Y, I, Q. The samples are averaged to produce a sample, which produces aliasing distortion. The signal is sub-sampled by the 8Xfsc signal. By filter 438 The signal generated by the first delay element among the four delay elements connected in series is 525 horizontal line periods (524H) are supplied to delay element 440. 3 other delay elements The children 442, 444, and 446 provide signals delayed by IH, LH, and 524H, respectively. supply.

The output signal of delay element 442 becomes a reference signal. The output signals of delay elements 440 and 444 The signals lead and lag by IH with respect to the reference signal, respectively. Run The input signal of the scanning converter and the output signal of the delay element 446 are respectively relative to the reference signal. , is ahead by one field period of the 1050LPF interlaced scanning signal, and is delayed again. There is.

The output signals of delay elements 440 and 444 are sent to multiplexers (MUX) 450, respectively. is supplied to each input port.

Multiplexer 450 divides the continuous field of signals provided by camera 10 into During the period, the signal from delay element 440 and the signal from delay element 444 are alternately supplied. conditioned by the signal FT supplied from the studio timing signal generator 11 so as to subject to change. The signal generated by multiplexer 450 is sent to adder 458 and is combined with the reference signal provided by delay element 442 by subtractor 456 . The output signal of adder 458 is the vertical average signal VAVG, and the output signal of subtracter 456 is Is the signal the vertical difference signal VDIFFI? be. Signals VAVG and VDIFFli, Tsuretsu The reference signal is delayed by 525H with respect to the input signal, and the reference signal is delayed by 525H with respect to the input signal. Additive and subtractive combinations of H and 526H with alternating delayed signals represents.

The signal to be combined with the reference signal is switched by following the movement of the image by the camera 10. It is controlled by the signal FT in order to

The input signal to the scan converter and the output signal of delay element 446 are input to adder 460 and subtracter 4. 62 to produce a temporal average signal TAVG and a temporal difference signal TDIFF, respectively. occurs. The time average signal TAVG and the time difference signal TDIFF are always one frame. represents a combination of signals that are separated by one frame period, 1050H.

Signals VDIFF and TDIFF are provided to a conventional motion detector 464 and The output signal of 4 is provided to a conventional motion extender 466. Detector 464 is, for example, , the relative magnitudes of the respective time difference signals and vertical difference signals TDIFF and VDIFF are It may also include a comparator (not shown) for comparison. In addition, the detector 464 A filter (not shown) may also be included. Motion dilator 466 connects detector 464 to (tbteskold), and the determined signal is horizontally Averaging in the direction, vertically, and temporally to move the boundaries of moving image parts. Circuitry (not shown) extending to the dead area may also be included. The motion signal is In order to reduce any boundary effects in arbitrary motion adaptive processing using Expanded. In general, rather than treating a moving part as a stationary part, Treating the minute as a moving part results in fewer artifacts.

Motion extender 466 provides motion indicating signals M and (1-M) and provides motion indication signals M and (1-M). -M) are provided to multipliers 468 and 470, respectively. Multipliers 468 and 47 0 scales the signals VAVG and TAVG by these motion indication signals, respectively. It is configured to be Output signals provided by multipliers 468 and 470 are summed by adder 472 to produce an interpolated signal.

Signals M and (1-M) are fractional values that complement each other.

The magnitude of M is determined by the field lead signal, field delay signal, and reference signal. It is directly proportional to the level of inter-field motion within the video image being represented. Therefore , if a portion of the displayed image has a high level of interfield motion, that portion A relatively large component of the interpolated signal for is obtained from the vertical average signal VAVG. , only a few components are obtained from the time-averaged signal TAVG. The image is relatively still. In stopped areas, i.e. where the level of movement between fields is low, this ratio is reversed. become.

generated by switching between vertical and temporal averaging with and without interfield motion. The interpolated signal generated has sufficient temporal resolution in the moving part of the image, Have sufficient vertical resolution in the static part of the image. The inventors believe that this type of motion adaptive processing It is determined that the method yields better results than pure temporal interpolation or pure vertical interpolation. There is.

The output signal of the adder 472 is reduced by a factor of 2 in a divide-by-2 circuit 474. emit a digital signal occupying the same range of amplitude values as the signal supplied to scan converter 16; live. The output signal of divide by 2 circuit 474 and the reference provided by delay element 442 The signals are each provided to an input port of adder 480 and an output port of adder 480. The input port is coupled to the input port of a divide by two circuit 482. Adder 480 and division by 2 Path 482 is an interpolated line representing the interstitial lines of the 1050 LPF interlaced image. forming an average of the sample values provided by the camera 10 and the sample values provided by the camera 10; subordinate Thus, the output signal of circuit 482 is a 1050 LPF sequential running pair of continuous lines. It can be considered as the average of the scanning signals. The inventors believe that this is due to the quality of the 525LPF progressive scan signal. It is judged that this is a good approximation method.

With reference to FIG. 1b, the 525 LPF progressive scan signal provided by scan converter 16 IF, QF, and YF are respectively different progressive scan/interlaced scan converters 17a and 17b. , 17C. A suitable circuit for use as converter 17c is shown in Figure 5a. A circuit suitable for use with either transducer 17a or 17b is shown in FIG. 5b. show.

The scan converter shown in FIG. 5a includes one field (525H) delay elements 510 and 51. a signal averager formed by 2, an adder 514 and a divide by 2 circuit 516. I'm here. The signal provided by the signal averager is provided by delay element 512 It is the average of signal A and input signal YF, ie, B. These signals are 2 filters period apart. This averaged signal is processed by a delay element in a subtracter 518. 510 to produce a field difference signal YT. do. Signal X represents the field of the video signal between signals A and B.

Signals X and YT are provided to separate poles of switch 520.

The wiper of switch 520 is connected to the horizontal scan frequency defined by the NTSC standard. Square wave signals with qualitatively equal frequencies and 50 percent duty cycle Controlled by Fs. The signal Fs conditions the switch 520 so that one of the signals Line samples and samples of one line of signal YT are alternately supplied. these The sample is stored in the dual terminal (d■t-po) memory in response to the signal 8xfsc. A signal written in 4Xfsc with a frequency approximately four times the color subcarrier frequency are read out from memory in parallel as signals YF' and YT. signal YF' is a 525LPF interlaced scan luminance signal. The signal YT is It is used to generate the helluva signal mentioned above.

The scan converter shown in FIG. 5b includes a one field compensated delay element 530 and a dual terminal memory. 532. The delayed samples of signal IF or QF are respectively signal 8 In response to ×fSC and 4XfSC, the memory 53 Read from 2. The output signal of the memory 532 has an appropriate time relationship with the signal YF'. This is the 525LPF interlaced scanning signal IF' or QF'.

1b, provided by scan converters 17a, 17b and 17C, respectively. The signals IF', QF' and YF' are filtered by the respective low-pass filters 19. a, 19b and 19c. Filters 19a and 19b are the signal IF' and reduce the horizontal bandwidth of QF' to 500 kHz. Filter 19c receives signal YF ’ horizontal bandwidth to 5MHI. Low pass filters 19a, 19b and 19 The output signals IF', QF' and YF' of c are side-to-center signal separator/processor 1. 8. Details of the separator/processor 18 are shown in FIGS. 6, 7, and 8.

FIG. 6 is a block diagram of a portion of separator/processor 18. This part is the luminance signal YF' is the signal YE representing the time-expanded central panel pixel, and the time-compressed The signal YO representing the side panel pixels and the high frequency components of the side panel pixels signal YH. Signals YE and YO are the first components of the encoded EDTV signal. signal YH is used to form the second component signal. Ru.

In FIG. 6, a low pass filter 610 filters the signal YF' to 0 ki(t). The signal YL is The calculator 612 delays l; and subtracts it from the signal YF', resulting in a signal of 700 kHz. A signal YHO is generated that occupies a frequency band from 5 MHr to 5 MHr. delayed signal Y F', signal YHO and signal YL are provided to a demultiplexer (DEMUX) 616. be provided. Circuit 616 is described below in connection with FIG. The part of the signal YF' corresponding to the image is passed as the signal YC, and the image on the side panel is Pass the corresponding signal YHO and YL parts as signals YH and YL', respectively let The signal YC is time expanded by a time expander 622 as shown in FIG. and provides a signal YE with a bandwidth of 4.214Ht. The signal YL' is As shown in FIG. A signal YO with r is provided. The time expander 622 and the time compressor 628 This is realized by the circuit described below in connection with FIG. 2 and FIGS. 12a to 12d. be able to.

The circuit shown in FIG. 7 is the same as the circuit shown in FIG. 0 passband is OTo~700kll for the corresponding filter 610 in FIG. ! On the other hand, OH! ~83kHt.

FIG. 8 can be used as the demultiplexer 716 of FIG. 7 or as the demultiplexer of FIG. A block diagram of a demultiplexer circuit that can be used as a lexer 616. be.

The circuit shown in Figure 8 includes three multiplexers 810, 812, and 814, with each The multiplexers are coupled to count comparators 817, 818, and 820, respectively.

Each of these count comparators is connected to receive and receive count values from the counter 822. Ru. Counter 822 is clocked by signal 4XfSC. The counter 822 , reset by the signal H supplied by the studio timing signal generator 11. will be played. Signal H is generated once per horizontal line period and is applied to the first image on each horizontal line. Display the position of the image sample.

Count comparison in response to count values 1 to 84 and count values 671 to 754 817 and 820 condition multiplexers 810 and 814, respectively, to Pass the numbers YHO and YL respectively. Multiplexers 810 and 814 In response to all counts, blanking signal BLK is passed. Similarly, calculate Number comparator 818 conditions multiplexer 812 to convert the count from 75 to 680. For other count values, the blanking signal is passed. let The center and side panel pixels are, for example, as shown in the waveform diagram of FIG. The 10 samples are overlapping and the width is assists in reconstructing a screen HDTV signal.

As previously mentioned, time expanders 622 and 722 and time compressors 628 and 728 can be realized by a circuit as shown in FIG. The circuit shown in Figure 12 is 4 A series of pixel values are temporally expanded using dual terminal memories 1216a to 1216d. expansion (by repeating samples) or time compression (by deleting samples). ). The circuit shown in FIG. 12 is further provided with a dual terminal memory. a pair of peaking filters 1220 and 12 for amplifying high frequency components of the signal; 22 and time-expanded or time-compressed signals by combining the peaked signals. A two-point linear interpolator 1230 is included for generating the video signal. Pekin Filters 1220 and 1222 compensate for the low pass filtering inherent in two-point linear interpolation.

Pixel counter 1210 and two programmable read-only memories (FROM ) i212 and 1225 control the circuit shown in FIG. FROMI 212 and By properly programming the 1225, the circuit of FIG. It can be used to achieve a high compression ratio.

In operation, the video input signal S (which is e.g. demultiplexer 616 in FIG. signal YC provided by dual terminal memory 1216a and three is supplied to delay elements 1214a, 1214b and 1214c connected in series. Ru. The output signals of delay elements 1214a, 1214b and 1214c are Supplied to the input terminals of paired terminal memories 1216b, 1216c and 1216d. . The write address signal M used for the memories 1216a to 1216d is the pixel counter 1. 21o. Signal M is also provided to PROMI 212. F.R.O. MI 212 is a read address used for memories 1216a to 1216d. A signal N is generated and provided to two-point linear interpolator 1230 and PROM 1225. The interpolation coefficient DX is generated. When time-expanding a signal using the circuit shown in Figure 12, If so, program FROMI 212 to generate read address signal N.

Signal N increases in value more slowly than signal M. As a result, memories 1216a~ 1216d repeats the sample value. Signal using the circuit shown in Figure 12 In the case of time compression, the read address signal N increases in value faster than the signal M. So As a result, the memories 1216a-1216d skip sample values. PR The OM1225 adjusts the peak in response to different interpolation coefficients, as shown in Figure 1.2d. Changing the peaking coefficient PX supplied to the king filters 1220 and 1222 can be programmed to

Figure 12b shows peaking filters 122o and 1222 and two-point linear interpolation. The details of the container 123o are shown. FIG. 12c is used for peaking filter 122o. The details of the high-pass filter 1240 shown in FIG. The same filter is a peaking filter Also used for 1222.

With respect to FIG. 1b, the separated and time-extended center panel signals IE, QE, YE and separated and time-compressed side panel signals 10. QO, YO are processor 18 and is fed to the side/center combiner 28. The combiner 28 converts the signal H into A counter (not shown) that is reset by ) can be included. The count signal generated by this counter is multiplexed. (not shown). The multiplexer, as shown in the third arlA, Signals YE and YO are combined to generate output signal YN. Combiner 28 is of the same type as this It includes a circuit (not shown) of the formula, which combines the signals E and 10 to generate the signal It generates signal IN and also combines signals QE and QO to generate signal QN.

The signals YN, IN, QN provided by the synthesizer 28 are sent to the NTSC encoder 31. Supplied. Encoder 31 includes a horizontal-vertical temporal (HVT) filter 34 . HVT filter 34 separates the modulated color subcarrier signal and the modulated alternating subcarrier signal. Transfer of a comb filter to remove spectral components of the luminance signal that are confused with the transmitted signal The signal YN is processed by the sending function. The output signal of the HVT filter 34 is the signal YP It is. The color difference signals IN and QN are supplied to a quadrature modulator 30, which Generates NTSC chrominance signal CN in response to clock signal 4×fsc . The signal CN is supplied to a vertical time (VT) filter 32, which The signal CN is comb-filtered and corresponds to a modulated alternating subcarrier and a high frequency luminance signal. Remove spectral components. The output signal of filter 32 is signal CP. Signal C P and YP are additively combined by a signal combiner 36 to produce an encoded EDTV signal. A signal C/SL, which is the first component signal of the signal, is generated.

FIG. 9 is a more detailed block diagram of the NTSC encoder 31. Figure 9 Smell Thus, the first pair of latches 910 and 912 respond to clock signals 2Xf8C and 4Xfsc. Answer: ■ Signals IN and QN are included in the signal that alternates samples and Q samples. Multiply. The circle at the input of the latch 910 is the reciprocal of the clock signal 2xfsc Indicates a response to (in-merse). Supplied by latches 910 and 912 The signal sent to the second pair of latches 914 and 916 is , generate the signal CN by changing the polarity of the alternating pairs of samples, as shown in Figure 9. do. Signal CN is supplied to vT bandpass filter 32. Signal 4xfsc and 2xf sc is supplied from a studio timing signal generator 11.

FIG. 10 shows a block of an FIR filter suitable for use as filter 32. It is a diagram. The filter shown in Figure 10 uses samples from four consecutive fields. and generate its output signal. Each of the filter's nine taps has its own filter. Multiply by filter coefficient values a1 to a9. FIG. 10a shows the HvT bandpass filter 34. As a VT band-stop filter such as used in 10 shows a diagram of coefficient values used to construct the filter shown in FIG.

FIG. 10b shows a filter suitable for use as an HVT band-stop filter 34. FIG. In fact, the filter 34 is OH! From 1.5MH! until flat It has flat frequency response characteristics, I, 5MH! to 4.2MHr is a comb-shaped layer wave. It has a number response characteristic. The zeros of the comb characteristic are located in the modulated chrominance signal. and are arranged to substantially block components of signal YN that appear as crosstalk. No. In figure 10b, signal YN has a passband from Q)IX to 1.5MHx. A horizontal low pass filter 1020 is provided. The output signal of filter 1020 is Subtracted from signal YN provided by compensation delay element 1022 and high-pass filtered. generates a luminance signal based on the This high-pass filtered luminance signal is shown in FIGS. 10 and 10a. A VT bandstop filter 1021, as described above in connection with the figure, is provided.

The output signal of the VT band blind filter 1024 is provided by the compensated delay element 1024. and the low-pass filtered luminance signal to produce the output signal YP. 9th As shown in the figure, the signal CP and signal YP supplied from the T-band filter 32 are combined. The signals are additively combined by a synthesizer 36 to generate a first component signal C/SL.

With reference to FIG. 1b, the signals provided by the side-to-center signal separator/processor 18 The numbers IH, QH, and YH represent the high frequency components of the side panel widescreen image. and is supplied to the NTSC encoder 60. The encoder 60 is the NTS mentioned earlier. It may be the same as the C encoder 31.

The output signal NTSCH of the encoder 60 is supplied to a time expander 62. expands the side panel high frequency signal and generates the signal ESH, as shown in Figure 3C. do.

Signal ESH is a portion of one horizontal line time corresponding to the center panel portion of signal C/SL. occupies Time dilator 62 is associated with FIGS. 12 and 12a-12d. This can be realized by the circuit described above. Signal ESH is wide screen This is the second component signal of the lean EDTV signal.

The luminance signal YF' supplied by the progressive scan/interlaced scan converter 17c is is supplied to the router 70. The bandpass filter 70 has a frequency range from 5 MHz to 6. OMH! to frequency is passed through the amplitude modulator/low pass filter 72. Modulator 72 is conventional A sample data sine wave signal with a frequency of 5M) Iz The signal supplied from the bandpass filter 70 is subjected to hetero gain at the signal fc. signal fc is provided by studio timing signal generator 11. The circuit 72 includes 1.　 OMH! A low-frequency filter that sufficiently removes the above modulated signal components and the base I/F signal components. Contains a filter. The operation performed by circuit 72 is essentially in the 5-6.0 MHr band. From 0 to 1. OMH! is to frequency-shift the high-frequency luminance information up to the band . The signal provided by modulator/low pass filter 72 is connected to the center panel of signal C/SL. A filter that time-compresses this signal so that it occupies a part of one horizontal line period corresponding to the full part. A format encoder 74 is provided.

By means of the signal C/SL1 time expander 62 provided by the NTSC encoder 31 The signal ESH provided and the signal provided by format encoder 74. The signals are intra-frame averaged by intra-frame averaging circuits 38, 64, and 76, respectively. be done. By intra-frame averaging processing, each field of two fields in a certain frame is The signal in the field will be the same. This process is used for widescreen EDTV broadcasts. in such a way that the various component signals of the signal are easily separated by the EDTV decoder. This is important for combining the second and third component signals with the first component signal.

As mentioned earlier, the signal C/SL is 1.5MH! For the above frequency components and is intra-frame averaged only in the central panel region. Frequency 1. The components below 5MHr and in the side panel region were reconstituted. Not intra-frame averaged to preserve vertical/temporal detail in the image. 1st ．． Figure 1b shows a circuit suitable for use as the high-frequency component intra-frame averaging circuit 38. FIG. In FIG. 11b, the input signal IN.

In this case, the signal C/SL is a pair of serially connected 1-field (262H) delays. Spreading elements 1120 and 1122 are provided. Output signal Y1+C of delay element 1120 1 is supplied to one input port of the averaging circuit 1128 and the other input port is the output signal or input signal of the delay element 1122 via the multiplexer 1125. The receiver is connected to take either number Y2+C2. The multiplexer 1125 is , conditioned by a frame frequency signal Fs supplied to its control input port. The signal Y2+02 is supplied during one field period of one frame, and the The output signal of delay element 1122 is supplied during the other field period. multiple Lexer 1125 always has the same signal Y1+C1 provided by delay element 1120. It supplies signals within the same frame.

The averaging circuit 1128 scales the signal Y1+C1 by 1 1/2 and performs multiplexing. The signal supplied from the waveguide 1125 is scaled by 1/2, and the scaled signal is Add up the numbers. The signal provided by averaging circuit 1128 is passed to filter 1130. Higher pass filtered, 1.5MH! Sufficiently remove components with frequencies below . The output signal of filter 1130 is provided to gate 1132. gate 1132 for example, by a circuit including a pixel counter (not shown) and a decoder (not shown). The signal provided by filter 1130 as controlled by the generated control signal is passed only during the center panel portion of the signal applied to the gate. game) The output signal of 1132 is provided to one input port of adder 1134. adder The other input port of 1134 receives signal Y1 provided from delay element 1120. +C1 is coupled to receive the signal.

The output signal of the adder 1134 is the signal N shown in FIG. 1b, which is a high frequency component frame. This is the output signal of the intra-frame averaging circuit 38.

A circuit 11a suitable for use as the intra-frame averaging circuit 64 or 76 is As shown in the figure. In FIG. 11a, the signal IN (in this case signal ESH) is connected to a pair of It is supplied to delay elements 1110 and 1112 connected in series.

The output signal Y1+C1 of delay element 1110 is connected to one input port of averaging circuit 1118. input signal IN.

That is, the output signal of delay element 1112 is routed through multiplexer 1115. 1118 to the other input port of line 1118. The multiplexer 1115 is The output signal of delay element 1112 and signal IN during alternate fields of the input signal. A field frequency (30Hz) switching signal Fs is used to pass the signal alternately. conditioned.

The signal supplied from multiplexer 1115 is supplied from delay element 1110. It is always within the same frame period as the signal that follows. Averaging circuit 1118 calculates the value of its input signal. each by a factor of 2, and the resulting signals are summed and averaged within the frame. generates an output signal.

Regarding FIG. 1b, the output signal of the high frequency component intra-frame averaging circuit 38 is input to the adder 40. is supplied to one input port of the . Each of the intra-frame averaging circuits 64 and 76 The output signals X and 2 of used to modulate the subcarrier signals ASC and ASC' and generate the signal M. Ru. Signal M is applied to a second input port of adder 40. Output signal of adder 40 No. NTSCF is the first .NTSCF of widescreen HDTV signals. Second. The third component signal is It is a synthetic product. The signal NTSCF is a digital-to-analog converter (DAC). ) 54.

FIG. 13 is a block diagram of a circuit suitable for use as modulator 80. 1st 3, the signals provided by intra-frame averaging circuits 64 and 76, respectively. X and Z are supplied by FROMI 310 and 1.312 respectively.

Each of PROMI 310 and 1312 is programmed with an amplitude compression function and its - An example is illustrated adjacent FROM 1312 with a graph of the input/output function. F.R. The output signals of OMs 1310 and 1312 are output to multipliers 1314 and 1316, respectively. 1 input port. The second input port of multiplier 1314 is an alternating subcarrier. A second input port of multiplier 1316 is coupled to receive and receive transmit signal ASC'. is coupled to receive and receive an alternating subcarrier signal ASC. Signal ASC and ASC’ is provided by studio timing signal generator 11. Multiplier 1314 and 1 The output signals of 316 are summed by adder 1320 to provide a quadrature modulated output signal M. live.

With reference to FIG. 1b, the frame difference provided by the progressive-to-interlaced converter 17c. Signal YT is provided to format encoder 78. format enco 12 and 12a-12d. May include roads. The encoder 78 encodes the signal YT as shown in FIG. 1f. Expand the center panel section and compress the side panel sections. format encode The signal provided by the encoder 78 is provided to a motion encoder/low pass filter 79. Ru. A second exemplary circuit for use as a motion encoder/low-pass filter 79 Shown in Figure 3.

The motion encoder in circuit 79 converts changes in the signal YT and determines whether the YT times the signal is positive or negative. The motion of the image is expressed as +1QIRE or -101RE, depending on the situation. this If there is a large amount of noise in the transmission path between the transmitter and receiver due to conversion, The performance of the decoded signal YT at the receiver is enhanced. This motion encoding “Help” The use of the PA'' signal is discussed below in connection with FIGS. 22 and 27.

In the circuit shown in FIG. The signal is provided to one input port of adder 2368 and to comparator 2364. comparator 2364 generates an output signal that is output from format encoder 78. Displays whether the supplied signal is positive, negative, or zero. Comparator 2 The signal generated by the represents 10 IRE units, -10 IRE units or 0 IRE units, depending on multiplexer 2366 is conditioned to pass the digital value.

The signal provided by multiplexer 2366 is applied to the second input port of adder 2368. supplied to the The output signal of adder 2368 is the output signal YTN of circuit 79. . This signal is fed to the DAC 53 shown in Figure 1b.

DACs 53 and 54 respectively use signals YTN and NTSCF as analog signals. Occur. The signal provided by DAC 54 is provided to analog switch 58. It will be done.

Analog switch 58 is supplied from studio timing signal generator 11. is controlled by the signal SW, and the composite synchronization signal ocps is also supplied from the generator 11. (supplied) into the horizontal/vertical blanking period of the analog NTSCF signal. Faith Although the signal ocps is shown as an analog signal, it is also possible to use a digital signal ocps. It is also possible to use In this case, instead of the analog switch 58, an ordinary A two-person multiplexer will be placed between the adder 40 and the DAC 54. Probably.

The output signal of switch 58 is connected to one input terminal of radio frequency (RF) quadrature modulator 57. Supplied. Another input terminal of modulator 57 is provided by DAC 53. It is coupled to receive a helluva signal which is an analog version of the signal YTN. Modulator 5 7 is the residual sidewave with the signal NTSCF as the in-phase component and the heller signal as the quadrature component. A band television signal MAIN is generated. This signal provided by modulator 57 is provided to transmitter 55, which transmits it from antenna 115.

As shown in FIG. 1, a signal M provided by a single channel encoder 114 AIN is provided to a single channel decoder 140. Used as decoder 140 A suitable circuit for use is shown in FIG. An overview of its operation is shown in Figure 14. The decoder demodulates the signal MAIN and extracts its in-phase and quadrature components NTSCF. and YTN respectively. Processing the signal NTSCF to determine the first, second and second Regenerate the three-component signal. These signals may be further decoded, compressed, or are expanded and combined to produce the luminance signal YF', color difference signals IF' and QF' occurs. These are all 525LPF interlaced scan signals. Helper signal YT N is also decoded and used to convert the signal YF' into a 525LPF progressive scan signal. Ru.

The color difference signals IF' and QF' can be converted to progressive scanning type without any help from the helluva signal. will be replaced. Finally, the sequential scanning signals YF, IF, QF are analog signals Y', I'Q ’ is converted to

In FIG. 14, signal MAIN is provided to input unit 1422. In FIG. Crab filling The unit 1422 is a radio frequency (RF) tuner/amplifier circuit that receives the video signal. A synchronous video demodulator that extracts the in-phase/quadrature modulated components of the It includes a digital converter (ADC). By the ADC of Irukaninit 1422 The signal NTSCF supplied by the signal MAIN represents the in-phase modulation component of the signal MAIN. YTN stands for quadrature modulation component.

Signal NTSCF is supplied to synchronization signal separation/clock signal generation circuit 1432 . The circuit 1432 separates the horizontal/vertical synchronization signals H3 and ■S from the signal NTSCH. Contains an ordinary circuit that combines signals H3 and ■S to generate a composite synchronization signal C8. It is. Circuit 1432 also includes a conventional phase-locked loop (PLL). . In this PLL, the frequency fsC of the color synchronized burst signal component of the signal NTSCH is Two clock signals with frequencies 4Xfsc and 8XfsC that are 4x and 8x, respectively. No. CK4 and CK8 are generated. In the circuit 1432, from the signal CK4, the horizontal line running At 395 times 1/2 of the scanning frequency, the quadrature position with a frequency of approximately 3.1M+(! Phase-related alternating subcarrier signals ASC and ASC' and approximately 5M) l! the frequency of A signal fc having the following values is generated. To generate signals ASC, ASC' and fc , for example, increments a counter (not shown) with signal CK4 and the value of the counter is a readout programmed to provide sample values representing these three signals. and is supplied to a dedicated memory ROM (not shown). Furthermore, the ROM has a signal NTSCF An output signal H indicating a predetermined pixel sampling time in each horizontal period of It can also be supplied. This signal is further fed to another counter (not shown) and counted. The counter may be a frame or or field frequency. at the receiver Exemplary circuits for generating various clock and timing signals are described above. Further details are provided in U.S. Patent Application No. 241.277.

The signal NTSCF provided by the input crab unit 1422 is an intra-frame averaging circuit. /supplied to the differential circuit 1424. The circuit 1424 calculates the average pixel value and the pixel difference value. This occurs for corresponding pixels in two fields constituting one frame. flat The average pixel value is the output signal N, which corresponds to the first component of the EDTV signal, and the pixel difference value is the output signal M, which is the modulated second component of the widescreen HDTV signal. corresponds to the minute and third component. Figures 15 and 16 show the intra-frame averaging circuit/difference circuit. 14 is a block diagram illustrating a circuit suitable for use as line 1424. FIG. Figure 15 shows the operation of the circuit 1424 during the first field period of one frame. 1st FIG. 6 shows the operation of the circuit during the second field period of one frame.

15 and 16, the signal NTSCF is connected in series as the input signal IN. It is supplied to two connected delay elements 1520 and 1522. Delay element 1520 and 1522 each give a time delay approximately equal to one field period (262H). Ru. The output signal of the delay element 1522 and the signal IN are sent to the multiplexer 152, respectively. 5 different input ports. Multiplexer 1525 provides timing signals. conditioned by a frame frequency signal FS provided by a signal generator 1432. , the two input signals during alternating fields of signal MAIN. Ma The signal provided by multiplexer 1525 is provided by delay element 1520. Always in the same frame as the signal. The signal supplied from the delay element 1520 and the signal supplied from the delay element 1520 The signal provided by multiplexer 1525 is provided to averaging circuit 1528.

Circuit 1528 is provided by delay element 1520 and multiplexer 1525 The signals are downsized by -1/2 and 1/2, respectively, and the downsized signals are summed. child By operating the NTSCH signal, the two fields that make up one frame are wide screens with a common component between them, i.e. a frequency higher than 1.5 MHz. The first component signal of the EDTV signal is erased. Output signal of averaging circuit 1528 is fed to a horizontal high-pass filter 1530, which has a frequency of 1.7 MH ! The following first component signals are sufficiently removed. The signal provided by filter 1530 is controlled by signal C8 provided by timing signal generator 1432. Pass through gate 1532. Signal C8 conditions gate 1532 to Only the signal from the central panel portion of the signal supplied by the sensor 1530 is passed through. . This portion of the signal is the quadrature modulated second and second part of the widescreen HDTV signal. and the inverted signal of signal M, which is the third component signal. supplied by gate 1532 The signal supplied from delay element 1520 is added by adder 1534 to the signal supplied from delay element 1520. is used to generate a first component signal N, which is complemented by a circuit 1535 to generate a signal M. live.

With reference to FIG. 14, the signal M provided by circuit 1424 is quadrature demodulated/amplitude Supplied to expansion circuit 1426. Circuit 1426 quadrature demodulates signal M, resulting in Expanding the amplitude of the combined in-phase and quadrature signals to increase the amplitude of each phase of the HDTV signal Regenerate the second and third components. FIG. 17 shows the quadrature demodulation/amplitude expansion circuit 1426 and FIG. 2 is a block diagram of a circuit suitable for use as a controller.

In FIG. 17, signal M is applied to signal AS in multipliers 1710 and 1712, respectively. Multiply C and ASC'. The output signals of multipliers 1710 and 1712 are respectively signal low pass filters 1713 and 1715 that sufficiently remove M and all high frequency modulation components; supplied to The output signals of filters 1713 and 1715 are programmed, respectively. Read only memory (FROM) 1714 and 1716 are provided. F.R.O. MI 714 and 1716 detect the second and third components in a compatible composite signal. is the inverse of the amplitude compression function used within the encoder to psychophysically hide Programmed with amplitude expansion function. The output signal X of FROMI 714 is the decoded second component signal, which is an extended high frequency component of the channel signal; F.R. The output signal 2 of the OM1716 is the frequency biased signal of a broadband widescreen EDTV signal. The decoded third component signal is the transferred high frequency luminance signal component.

With reference to FIG. 14, signal X is provided to side panel compression circuit 1428 and circuit 1 428 reverses the side panel data expansion done by the encoder circuit . This operation generates the signal NTSCH. The signal NTSCH is shown in Figure 19. Y-1-Q format encoder 1444, described below in connection with side, brought back into proper time relationship with the generated time-compressed center panel signal. Represents the high frequency component of the panel signal. The compression circuit 1428 is shown in FIGS. It can be realized with circuits of the type described above in connection with figures a to 12d.

Signal NTT SCH, compression coefficient 0.22 is used, second component of HDTV signal Generated from the expanded side panel data in signal X. Signal NTSCH is provided to a luminance/chrominance separation circuit 1440. Separation circuit 1440 separates the luminance (YH) component and chrominance component of the signal NTSCH. , demodulates the chrominance signal component and obtains two color difference signal components (IH and QH) .

Signals YH, IH, QH are signals YN, IN generated from the first component signal. , Q N, and a luminance/chromatic luminance separation circuit, Y-1-Q A format decoder 1444 is provided. Circuits 1440 and 1442 are the same Anything is fine. An exemplary circuit is shown in FIG.

In FIG. 18, signal N or signal NTSCH is fed to bandpass filter 1810. and a delay element 181 that compensates for the delay in passing through the filter 1810. 2. Filter 1810 used in embodiments of the present invention has horizontal-vertical It is a one-hour (H-V-T) bandpass filter. Used as HVT filter 1810 An exemplary circuit for this purpose is shown in Figure 10c. This filter includes: The bandwidth is 3M+ (! to 4.2M) I! horizontal bandpass filters 1030 up to V determined by the coefficient values shown in Figure 10a and the FIR filter shown in Figure 10. This is a T-band filter 1031. The output signal of filter 1810 is a separated clock signal. It is a negative signal. This signal is provided to the subtraction input port of subtractor 1814; The minuend input port is configured to receive and receive a signal provided from compensation delay element 1812. be combined. The output signal of the subtracter 1814 is the luminance component signal YN or YH. be.

The chrominance signal generated by filter 1810 consists of successive sample values, I , Q, -I, -Q, etc. Here, l and Q are the samples of color difference signals I and Q. The sign of the sample represents the sampling phase, not necessarily the sampling phase. does not represent the polarity of the signal. This chrominance signal is connected to the first latch 1815 and A second latch 1816 is provided. Latch 1°815 is the clock generator shown in Figure 14. In response to the phase clock signal ICK supplied from the raw circuit 1432, Chroma The sample value of the chrominance signal representing the I color difference signal component of the chrominance signal is held.

Latch 1816 inverts signal ICK, which is provided by inverter 1822. chrominance signal, retains sample values representing the Q color difference signal component of the chrominance signal. hold The output signals provided by latches 1815 and 1816 are It is supplied to complementation circuits 1818 and 1820. Circuits 1818 and 1820 are frequency divider 1824, pull data I, Q color difference Complement the alternating ones of the signal. The signals provided by circuits 1818 and 1820 are The demodulated signals are IN or IH and QN or QH, respectively.

As mentioned earlier, signals YH, YN, IH, IN, QI (and QN are Y-I- Q-format decoder 1444, where it is combined and widescreen Lean signals YFo', IF' and QF' are formed. format decoder An exemplary circuit used as 1444 is shown in FIG. In Figure 19, The one-component luminance signal and the color difference signals YN, IN and QN are output from the side panel to the center panel. channel separation circuit 1940. Circuit 1940 may, for example, demultiplex It may also include a pixel counter (not shown) and a pixel counter (not shown). The circuit 1940 is From a sample representing the center panel signal to a sample representing the low frequency component of the side panel signal. Separate the pixel values on each line. In the examples of the present invention, samples 1 to 14 and 741-754 represent side panel signals, samples 15-740 are center represents the panel signal.

Circuit 1940 provides a sample data signal. Sample showing side panel -Data signal Y0, 10. and QO are provided to time dilator 1942, dilator 1942 expands the signal by a factor of six to produce signals YL, IL and QL. signal YL, IL and QL are the low frequencies of the side panel signals put back into proper time relationship. Represents a component.

These signals are added to signals YH, IH9 and QH in a combining circuit 1946. and generates restored side panel signals YS, Is and QS.

Also, circuit 1.940 is the first component of the HDTV signal in the time-extended central panel section. sample data signals YE, IE, and QE representing . these signals is provided to a time compressor 1944, which converts the sample fist data signal to 0 ．． Generates the center panel signals YC, IC and QC compressed 81 times and decompressed. Ru.

The restored side and center panel signals are recombined by splicer 1960. , widescreen luminance signal (YF’) and color difference signal (IF’ and QF”) Occur. A circuit suitable for use as a splicer 1960 is shown in Figure 19a. vinegar. The splicer shown in FIG. 19a has center and side panel luminance signals YC and and YL to generate the wide screen luminance signal YFo'. circuitry 1910. Additionally, an I signal splicer 192 shown in FIG. 19a The 0 and Q signal splicer 1930 is similar in configuration and operation to the illustrated Y signal splicer. are the same.

For the encoding process, the center panel and side panel signals are divided into, e.g. By deliberately overlapping the side panels in the expansion and compression process, compensates for sample value degradation that occurs at the border between the center panel and the center panel. overlap the panel Without matching areas, degraded samples can touch each other and create seams in the reconstructed image. I can see it. The overlapping region consisting of 10 samples has a degraded sample value of 5 It has been found that this is sufficient to compensate individuals.

In FIG. 19a, multiplier 1911 causes the side After weighting the panel signal YS by multiplying it by the function W, the signal YC is supplied to the adder 1915. be provided. Similarly, as shown in the associated waveform, multiplier 1912 For complementary weighting, the panel signal YC is multiplied by the function (1-W) in the overlapping area, and then Signal YC is provided to adder 1915. These weighting functions are It exhibits a linear ramp type characteristic at , and has a value between 0 and 1. implement these To represent, for example, the weights are stored in a ROM (Fig. (not shown). Canada The output signal of the calculator 1915 is the spliced wide screen luminance signal YFo'. be.

With reference to FIG. 14, the signal Z provided by quadrature demodulator/amplitude expander 1426 is provided to time expander 1430. Time dilator 1430 (Fig. 12 and 12a to 12d) is realized by a circuit such as that described above in connection with Figures 12a to 12d). , expands the signal Z, which is the third component signal of the widescreen HDTV signal, to horizontally Occupies the entire valid video portion of the line period. The signal provided by the time dilator 1.430 The signal is provided to an amplitude modulator 1432.

The modulator 1432 converts the signal fc supplied from the clock generation circuit 1432 into a time signal. The high frequency luminance signal is converted to the original frequency band by multiplying the signal provided by the expander 1430. Return to The high frequency luminance signal provided by modulator 1434 has a frequency of 5 MHI or less. It is fed to a high pass filter 1436 that rejects the wavenumbers. This filter is applied to modulator 1 The baseband component and all low frequency modulation components of the signal provided by 432 remove. The output signal of high-pass filter 1436 is one input terminal of adder 1436. The other input terminal is coupled to receive the signal YFo'.

The adder 1436 adds the high frequency component (5.0MH! to 6.0MM!) of the luminance signal. and the widescreen brightness signal YFo' to generate a wideband widescreen brightness signal. generates a degree signal YF'.

The helper signal YT formats the signal YTN provided by the input crab unit 1422. By feeding mat decoder 1460 and coring circuit 1458, It will be played from No. YTN. The format decoder 1460 Expand and compress the center panel portion of signal YTN to generate a modified helluva signal do. The helper signal is provided to coring circuit 1458. Circuit 1458 is - Modified help with values between 101RE units and +10IRE units and 0 Change the value of the PA signal. Additionally, circuit 1458 has a size greater than or equal to 10 IRE units. 10 IRE units are subtracted from the magnitude of the sampled value of signal YTN. For this reason, The level shift performed by the encoder is reversed and low amplitude noise (10r RE ) are removed from the modified helper signal. Output of coring circuit 1458 The signal is fed to an interlaced and progressive scan converter 1450, described below in connection with FIG. be done.

Signals YF', IF' and QF' are respectively output from interlaced scan/progressive scan converter 1. 450.1452 and 1454. Figures 20 and 21 are respectively 14 is a block diagram of a typical scan converter 1450, 1452, 1454. Second The scan converter shown in FIG. 0 includes an adder 2014 and a divide-by-2 circuit 2016.

Circuit 2016 receives input signal B (i.e. That is, the signal X is generated by averaging the signals (IF' or QF'). Signal A is the signal It is behind B by one frame period. Provided by delay element 2010 Signal C and signal X are provided to dual terminal memories 2020 and 201.8, respectively. be provided. The sample values are stored in memories 2018 and 2020 in response to signal CK4. and read from memories 2018 and 2020 in response to signal CK8. Being exposed. The output signals of memories 2018 and 2020 are sent to multiplexer 2022 are supplied to their respective input ports. The signal X line is connected to multiplexer 20 22, the 525LPF progressive scanning signal IF or or form a QF.

The scan converter shown in FIG. 21 includes all of the circuitry shown in FIG. To generate the signal X' by adding the averaged helluva signal YT to the frame averaged signal adder 2118. As mentioned earlier, the signal YT is the sample value of the line. Represents the difference between the frame-averaged approximate value and the actual sample value. Therefore, the signal represents a sample of the gap line and is used to generate the sample. Errors have been corrected in the averaging process performed. Output of the scan converter shown in Figure 21 The force signal is a 525LPF progressive scan signal YF.

With reference to FIG. 14, signals YF, IF and QF are provided to DAC circuit 1462. In turn, circuit 1462 generates analog signals Y', I' and Q', respectively. No. As shown in Figure 1, the signals Y', 1' and Q' 050LPF interlaced scan signals Y, I and Q to produce a wideband difference signal ΔY , ΔI and ΔQ. These wideband difference signals are processed by the auxiliary channel encoder. 142.

As mentioned above, in relation to FIG. 1, the frequency spectrum of the broadband difference signal ΔY is The range of torque is from OHx to 20Ml1! up to, and the frequency of the signals Δ■ and ΔQ is The range of the number spectrum is from OHX to IOMH! That's it. Auxiliary channel encoder The encoder 142 encodes these signals into a signal AUX having a bandwidth of 6MHI. . Additionally, signal AUX may include a digital audio signal. encoder The reader 142 uses separate circuits to generate a luminance difference signal ΔY and two color difference signals ΔI and ΔQ. encode. Figure 22 shows the circuit that encodes ΔY, and the circuit that encodes ΔI and ΔQ. The circuit shown in FIG. 24 is shown in FIG.

In FIG. 22, the signal ΔY is 06MHI low-pass filter 2244.6 12M Hx bandpass filter 2246 and 12-18MH! By bandpass filter 2248 , into components "A", "B", and "C". between 18MHz and 20MHz Frequencies contain little energy, so they are not transmitted. Therefore, component A exhibits a frequency spectrum from 0 to 6 MHI, and component B is from 6 to 12 M) l! frequency of component C exhibits a frequency spectrum from 12 to 18 MH+. Growth Minute A is coupled to one input terminal of switch S1.

Components B and C are filtered by mixer/low pass filter circuits 2250 and 2252, respectively. The frequency band is OH after downward frequency conversion! Occupies ~6MH+. of paired lines The down frequency converted components B and C are processed by line averager 2254 and 2256. The averaged line is 15k) lx (horizontal line circumference Each switch S2 operates at a frequency of 32 kHz (half of the wave number 32 kHz). is connected to the input terminal. The output signal of switch S2 includes an averaged line The B component signal of the line and the C component signal of the averaged line are included alternately. B By averaging and alternating the B and C component lines, the The vertical bandwidth of the horizontal high frequency component that is generated is reduced. Interchange of output signal of switch S2 Each line has a bandwidth of 6-12MHz and 12-18Mtl! Luminance information in Therefore, by this operation, the information in the frequency band 6 to i8 MHz will be changed to Effectively packed into several bands O~6MHt. The output terminal of switch S2 is A second input terminal of switch S1 is coupled to the second input terminal of switch S1.

Switch S1 is responsive to a switching signal provided by OR gate 2258.

The input of OR gate 2258 is the motion indicating signal provided by motion detector 2260. and a square wave signal of 15H2 (one half of the frame frequency 3082). Y When there is no motion in the image produced by the screen EDTV signal source 110 , that is, when the image is stationary, switch S1 is switched for each frame. , resulting in the sequence of fields shown in Figure 22a. However, there is movement in the image. At one time, switch s1 is conditioned to supply only component A.

Although many motion detectors are known, a modified one is used to obtain the motion indicating signal described below. using the helper signal (the fourth component of the widescreen HDTV signal mentioned earlier). It is advantageous to do so. The modified helluva signal is a single channel as shown in Figure 1. A channel decoder 140 provides an auxiliary channel encoder 142 .

This signal is generated in the manner described in connection with FIG.

Figure 28 shows an auxiliary channel encoder and single channel for providing helper signals. 14 shows an interface between the channel decoder 140 and the channel decoder 140. In Figure 28, the frame The modified helper signal provided by format decoder 1460 is The corer circuit 1458 and motion detector 2260 shown in FIG. It will be done. For the changed helper signal value IQIRE units ~ -101RE units, the dynamic The signal provided by the detector shows no movement, but for values outside this range , the signal supplied by the detector detects the frame-to-frame motion in the image being processed. indicates that.

Figure 24 is a block diagram of the circuit used to encode the difference signals Δ■ and ΔQ. be. The circuit shown in FIG. After time division multiplexing the reduced bandwidth signals ΔI and ΔQ, the resulting time-compress the signal. A time-compressed signal is divided into high-frequency and low-frequency components. are applied alternately at the field frequency to form signal CA. Auxiliary channel The signal YA and the signal CA supplied by the luminance signal encoder are time-division multiplexed, Generating a video signal having a multi-component format as shown in Figure 24a .

More specifically, in FIG. 24, the signals ΔI and ΔQ are each 2.4 MHs. low pass filters 2410 and 2416, and filters 2410 and 2416 Reduce the resolution of signals ΔI and ΔQ. The band-limited The limited signals are provided to line averaging circuits 2412 and 2418, respectively. times The lines 2412 and 2418 are the corresponding lines from successive lines of the respective signals Δl and ΔQ. Average the sample values. The signals provided by averaging circuits 2412 and 2418 signals are provided to respective input ports of line frequency multiplexer 2414. Ru. Line frequency multiplexer 2414 provides a line average during alternate line periods. Δ■ times signal ΔQ times signal samples are supplied, and both ΔI and ΔQ signals are combined into a single Pack into 2.4MHz signal. The signal provided by multiplexer 2414 The signal is time-compressed by a factor of 5 by time compression circuit 2422. of circuit 2422 The output signal is a 12 MHz signal (2, 4×5=12). This signal is filtered by a low-pass filter 2424 and a bandpass filter 2424, respectively. The frequency spectrum 0-6 MHI and 6-12 M It is split into two components with HX. provided by bandpass filter 2426 The signal is down-converted to the range θ~6MHz by mixer 2428, and the output of the mixer The signal is provided to field delay element 2430. low pass filter 2424 and The signal provided by field delay element 2430 is field frequency multiplexed. are provided to respective input ports of lexer 2432. multiplexer 2432 designates the signal applied to its input port as signal CA during consecutive field periods. and feed it alternately. Although not shown, in place of field delay element 2430 A frame delay element can be used and multiplexer 2432 can be used to Controlled by a motion indicating signal such as that provided by OR gate 2258 in FIG. It is considered possible to do so. In this case, the high frequency components and low frequency components of the signals ΔI and ΔQ The wave components are sent alternately on a frame-by-frame basis to the static portion of the image, and the signals ΔI and Only the low frequency components of ΔQ are sent for moving parts of the image. Because of this change, The spatial and temporal resolutions of signals ΔI and ΔQ are commensurate with the spatial/temporal resolution of signal ΔY. cormorant.

Signal CA and signal YA supplied by the circuit shown in FIG. ROMA multiplexer 2434 to different input ports. multiplex The sensor 2434 outputs signal YA during the first 755 sample periods of each valid horizontal line period. pass the signal CA for the next 150 sample periods, and then pass the signal CA for the next 150 sample periods and for the last 5 sample periods A blanking signal is passed between the lines. The digital audio signal shown in Figure 1 is inserted by equipment (not shown) during the vertical blanking period of the auxiliary video signal to It can be included in the No. YA/CA.

FIG. 25 shows an RF modulation/demodulation circuit suitable for use in the system shown in FIG. It is a block diagram. In this circuit, the 5MHx signal YA/CA is connected to the line A multiplexer 2510 is provided. Demultiplexer 2510 is for even lines The signal YA/CA of the period is supplied to the time expansion circuit 2512, and the signal YA/CA of the odd line period is is supplied to the time expansion circuit 2516. Circuit 2512 and circuit 2516 have their input ports doubles the signal fed to the corresponds to the output signal of the channel and occupies the frequency band OH2-3 MHI. time expansion circuit The signals provided by 2512 and 2516 are provided to modulator 2514, which The 2514 converts a pair of quadrature carrier signals into double-sideband signals using two input signals. modulation (DSM) or single sideband modulation of one carrier signal with each input signal. (DSSM) to preserve the upper sideband for one signal and the upper sideband for the other signal. to preserve the lower sideband. The signal provided by modulator 2514 is the current terrestrial broadcast signal. TV signals and co-channel interference is unlikely to occur. The reason The reason is that the carrier wave is located in the center of the transmission spectrum, and even if there is interference, it will be It is not as coherent as that produced by ordinary television signals. It is the body. AUX, the output signal of modulator 2514, is output from antenna 130 to is sent to channel decoder 134. Decoder 134 from antenna 132 Receive signal AUX.

The RF demodulator 2522 in the two-channel decoder 134 is expanded by a factor of two. demodulates the obtained signal and supplies the obtained results to time compression circuits 2524 and 2526. Ru.

Times '12524 and 2526 compress their respective input signals by a factor of two, resulting in The resulting signal is provided to line multiplexer 2528. multiplexer 2 528 alternates the signals applied to its two input ports during alternating horizontal line periods. and regenerate the signal YA/CA.

FIG. 29 is a block diagram of a typical two-channel decoder 134. Figure 29 , antennas 32 are connected to respective RF channels for transmitting main and auxiliary signals. It is coupled to two tuners 2902 and 2522 that tune the channel. single cha The channel decoder 2904 decodes the main signal generated by the tuner 2902 and , Y', I' and Q' component signals. Tuner 2902 and decoder 29 04 is the same as the single channel decoder previously described in connection with Figures 14-21. Same thing is fine. Auxiliary signal decoder 2906 is provided by tuner 2522 61H! Expanding the auxiliary signal to 18MH! Additional luminance signal ΔY and 2.4k lH! The additional color difference signals Δ■ and ΔQ are generated. The auxiliary signal decoder is shown in Figure 26 and Figure 26. This will be described below in connection with Figure 27. Signals ΔY, Δ■ and ΔQ are sent to adder 2908 ．． 2910 and 2912, single channel encoder 2904 It is combined with the supplied 525LPF sequential scanning signals Y', I' and Q', and 1050 L/F jump supplied to the screen EDTV display unit 136 Generate scanning signals Y', I' and Ql. The display unit 136 is an ordinary 525 It is an L/F sequential scanning display unit and is controlled by field frequency signals. , the displayed 525 lines are 1/2 of the line interval for each field. 1050LPF interlaced scanning display is performed.

The luma/chroma demultiplexer 2610 included in the circuit shown in FIG. The signal YA/C for each horizontal line period provided by multiplexer 2528 in FIG. From A, 150 chrominance samples CA and 15 luminance samples CA Separate 0 pieces. This circuit consists of the multiplexer 2 described above in connection with FIG. 434 is performed. Sample YA is shown in Figure 7. This is then processed by the circuit described below. Sample CA is field delay element 26 12.

The field delayed signal provided by element 2612 is passed through a mixer/band filter. The upper frequency is converted by the data filter 2614, and the frequency band is 6 MHr to 12 MH! of Occupy. The signal provided by mixer/bandpass filter 2614 is and is added to the low frequency chrominance signal provided from demultiplexer 2610. It will be done. The output signal of summer 2616 is fed to one pole of switch 2620 and The other pole of the switch is connected to adder 2616 via field delay element 2618. combine the signals provided by the be done.

Switch 2620 is 15H! conditioned by the low frequency clock signal CA. During the frame period representing the minus signal, the output signal provided by adder 2616 is signal is passed through the frame and signal CA represents a high frequency chrominance signal. The signal provided by spreading element 2618 is allowed to pass. Alternative method , when motion adaptive multiplexing of the signal CA is used by the encoding circuit, the 26th The circuit shown in the figure is a motion-adaptive demultiplexer of the type described below in connection with FIG. A multiplex circuit can be included. The signal provided by switch 2620 The signal is time-expanded five times by the circuit 2622 so that the signal CA is Generate 750 samples.

This operation reduces the frequency spectrum of signal CA to 0-2°4 MHr.

The time expanded signal CA is provided to line frequency demultiplexer 2624. . Demultiplexer 2624 demultiplexes one output port during alternate horizontal line periods. , we supply a line of samples of the reconstructed signal Δ■′ and another output At the output port, a line of samples of the reconstructed signal ΔQ' is provided.

Signals ΔI' and ΔQ' are fed to horizontal line interpolators 2626 and 2628, respectively. be done. Interpolators 2626 and 2628 generate interpolated lines from the existing line samples. The input signals are obtained and output signals Δ1 and ΔQ are obtained. The output signals ΔI and ΔQ are , each with 525 line samples per field period and horizontal frequency spectrum. Kutle 0~2.4MH! has.

A typical circuit for use as a luminance-added signal decoder is shown in FIG. 27th In the figure, signal YA is provided to one input port of multiplexer 2710. , its output port is coupled to the input port of frame delay element 2714. Friends The output port of delay element 2714 is connected to the second input port of multiplexer 2710. is combined with The multiplexer 27100 control signal is the signal H/L, which is the motion signal MOTION provided by the motion detector 2711 and the 15 Hz square It is the logical sum of wave signals. This signal changes state at the frame frequency. motion detector 2711 is the same as detector 2260 described above in connection with FIGS. 22 and 28. So it's good. Multiplexer 2710 is conditioned by control signal H/L to During alternating frame periods, or during per-frame periods in moving parts of the image. During this period, signal YA is passed.

For interpolated frames of still images, the control signal H/L is conditioned on multiplexer 2710. and recirculates the signal provided by frame delay element 27'14. centre The output signal of the frame delay element 2714 is a low frequency component signal (QH!~6) of the signal ΔY. It is 1411. This output signal is fed to one input port of adder 2716. It will be done. The second input port of adder 2716 is connected to the high level of signal ΔY for still images. Frequency components (6MHz!~18MHz) are combined to receive and remove, and for moving images is coupled to receive a zero value signal. For static parts of the image, adder The signal provided by the 2716 has a horizontal frequency spectrum OHz to 18MHz. However, the temporal update (upda!s) time is only 1/15 seconds, and the moving part of the image For minutes, the horizontal frequency spectrum is OH~6MHx, and the temporal update time is 1 /30 seconds.

In order to generate high frequency components of the signal ΔY, the luma/chroma demultiplexing shown in FIG. The signal YA supplied from the plexer 2610 is supplied to the demultiplexer 2718. It will be done.

The demultiplexer 2718 has a frequency of 15kHz (1050LPF The signal is controlled by a square wave signal with a frequency fH (half the frequency fH) of the line synchronization signal. Samples of alternating lines of No. YA are passed to mixer/bandpass filter circuits 2720 and 27. 22.

Circuits 2720 and 2722 are implemented by auxiliary channel encoder 142. Inverse frequency down conversion of ΔY times signal 6~12MHz and 12~1.8MHx components I do. The mixer/bandpass filter 2720 has a signal applied to its input port. 6Ml1! The carrier wave signal of 6 MH! Pass through a bandpass filter (not shown) with ~12MHI. This filter is based on Remove band signals and all spurious modulation components.

Similarly, mixer/filter 2722 has a signal applied to its input port. 2MH! modulate the carrier signal and filter the modulated signal with a bandpass filter. , frequency band 12MHr~18MH! occupies the following areas.

The signal provided by mixer/bandpass filter 2720 is sent to multiplexer 272 8 and one input port of IH delay element 2724. Delay element 2724 so as to provide its output signal to the second input port of multiplexer 2728. be combined. Multiplexer 2728 converts the 15kHz line frequency switching signal to During alternating horizontal lines, the output signal of circuit 2720 and the delay element The output signals of child 2724 are alternately provided. IH delay element 2726 and multiplex Circuit 2730 is similarly configured and, during alternating horizontal lines, circuit 2722 The output signal and the output signal of the delay element 2726 are alternately supplied. multiplexer 27 The line frequency signals supplied to 28 and 2730 are encoded by encoder circuit 142. For still images, multiplexer 27 is synchronized to the generated signal. 28 has a frequency band of 6MH! Line averaged ΔY times occupying ~12MH2 The multiplexer 2730 has a frequency band of 12MB! ~18MH! Divination The line averaged ΔY times signal is supplied. In moving parts of the image, as well as in static parts. During alternate frames of still images, multiplexers 2728 and 2730 The signal provided is invalid.

The output signals of multiplexers 2728 and 2730 are summed by adder 2732. , during the static part of the image, the frequency band 6 MH! ~18MH! ΔY times the signal component generate a signal representing . This signal is connected to one input port of multiplexer 2734. supplied to the The second input port of multiplexer 2734 is a zero value signal source. 2736. Multiplayer 2734 is conditioned by the signal H/L supplied by 2712 and provided by adder 2732 during the static portions of the image of alternate frames. otherwise passes the zero value signal provided by signal source 2736. let it pass

The output signal of the multiplexer 2734 is transmitted to the delay element 27 for one frame (1050H). 40 and one input port of multiplexer 2738. multiplex A second input port of sensor 2738 is connected to the frame input port provided by delay element 2740. The delayed signal is coupled to receive the delayed signal. Multiplexer 2738 is an AND gate Freezing of alternating frames is conditioned by control signals provided by 2742. between the images (i.e., the signal provided by multiplexer 2734 is averaged high frequency components) and between moving parts of the image (i.e. when the signal provided by multiplexer 2734 has a zero value), multiplexer 2 734. Only during the interpolated frame period of the still image, At this time, signal YA contains only low frequency components, and multiplexer 2738 is delayed. The signal provided by element 2740 is conditioned to pass. This structure multiplexer 2738 passes the zero value signal for the moving portion of the image. , a high-frequency signal ΔY times higher is passed through the still part of the image. multiplexer 27 The control signal of 38 is the phase of signal MO71ON supplied by inverter 2744. Auxiliary signal and 15H! This is the AND of the frame frequency switching signals.

The output signal of multiplexer 2738 is provided to the second input port of adder 2716. and generates a reconstructed signal ΔY. As mentioned earlier, the signal ΔY is For the part, the frequency spectrum 01L+ ~ 18M) IX and the temporal update period It has a frequency spectrum of 0 to 6 MH for the moving part of the image! oh and a temporal update period of 1/30 seconds.

In the embodiment of the invention described herein, the high and low frequency components of the signal ΔY are motion adaptively multiplexed on a frame basis. These signals are on the basis of a field period or a number of field periods larger than one frame period. It is also possible to perform motion adaptive multiplexing.

Frame frequency and line frequency control signals used by Korg 134, 6 MHz and 12MHr sample data carrier signals and 16Xfsc clock The same timing circuit as described above in connection with FIG. 14 is used to generate the clock signal. A timing signal generation circuit of the same type may also be included. Proper image reconstruction To ensure that one or more of the signals MAIN and AUX includes a timing reference signal such as a pseudorandom sequence in both It is more desirable to synchronize encoder 142 with decoder 136. This way A typical circuit for generating and decoding such a timing reference signal is National Patent Application No. 241,277 and referenced herein Error Coding J used for stem (Error Coding For Video U.S. Patent No. 4,309.712 titled Disc S7sS75l Disclosed in the specifications. As an alternative, the signal AUX Published by I.E.E. Transactions - On Consicoma E. Lectronics (IEEE T+ansacjiont on Consume Earl Hopkins (R Electronics), pages 4 to 5 of , Hopkins) paper ``Advanced Television System J (Advanced Television System J)''. ed Te1evison S7rlem), the Japan Broadcasting Corporation ( Updated synchronization, such as that used in the television system proposed by NHK It may also contain a signal. Is the exact timing information the zero crossing point of this synchronization signal? obtained from

29, provided by the luminance additive signal decoder. Signal ΔY1 and signals ΔI and Δ provided by the chrominance additional signal decoder Q is the signal Y', ! ’ and Q’ to create a widescreen HDT Wide screen HDTV signals Y', I' and V displayed on the V display unit 136 and Q'. The image generated in response to signals Y', I' and Q' is It has sufficient HDTV definition in static parts, better than standard NTSC image definition. However, the definition of moving parts of the image is inferior to that of HDTV images.

Se Zhiyun Dong YF’　IF”○P Special table 13-505656 (24) FIG, 10b FIG, 10c -m)e-DX (67) Ya () FIG, 77 FIG. 19 0L-1-ml-01 Translation of amendment page 4 (Article 184-8 of the Patent Law) August 29, 1990 Commissioner of the Patent Office Toshi Ue Matsu 1 Display of patent application PCT/US89100452 2 Name of the invention High-definition widescreen television system using multiple signal transmission channels tem 3 Patent applicant Address: River, Schenectaday, 12345, New York, United States Load 1 Name: General Electric Company 4 agent Postal code 100 Address: Room 336, Iino Building, 2-1-1 Uchisaiwaicho, Chiyoda-ku, Tokyo April 17, 1990 6 List of attached documents (1) Translation of written amendment 1 copy 7 Subject of amendment Description and claims of application translation 8 Contents of amendment 1. Translated pages 4 to 5 of the specification of the application translation to page 4 of the translation of the written amendment, No. 4/1 page, page 472, page 4/3, and page 5.

2. The number of claims in the translation of the application and the number of claims in the translation of the written amendment are the same. However, the contents have been amended from claims 1 to 9 of the translation of the application.

“Broadband integrated service digital network” fBroadband I+uegr altd 5 services Digital Network: BISDN) transmits high-definition video using lightwave technology in a single digital channel. The digital method was held in Hyuston, Texas, December 1-4, 1986. IEE Global Telecom Unicast A was held at Conference (! EEE Globesl Teleommuniea Announced at GLOBECOM-86 Confe+encs Record, Volua+e 2 of 31 G.A. Berry published on pages 894-900 of EEE (US) Geo (LA, 1llellisto) “Television for wideband 15DN” by private land Vision coding” band l5DN).

In the system described here, 1050 sequential lines with standard aspect ratio The scanned high-definition video signal is vertically filtered for digital transmission. Sampling is performed in a 2:1 ratio in the vertical direction, converted to 525 jump format, and coded. be converted into The encoded signal is also decoded and converted back to progressive scan format. , vertically interpolated into 1050 lines (luma only) and subtracted from the high-definition signal to generate a difference signal. live. This difference signal is quantized, entropy coded, and then encoded 150 Mb/s on a common transmission channel with the main video signal Multiplexed at digital data rates. This kind of system is common (analog ) is not compatible with television transmission channels and uses ordinary television receivers. A special digital decoder is required if

Another conventional example is the so-called NBC method. This method was introduced in February 1988. IEE Transactions on Consumer Electronics Kutronics (IEEE T+xn+xc+1ons on Consume r　El! Isnadi published on pages 111 to 120 of cl+onicS) (M.

l5nardi) Various problems of decoding in rACTV system by private land J (Decoding l++ue+ in the ACTV System) This is explained in more detail in the second paper. Part of this method was introduced in November 1988. “High Frequency in Widescreen Television Systems” granted on January 1st "device that processes wave information" (^ppx+atus lot P"ocessing ) limb Frequsnc71nto+mxtion in! Wid e+c+etn Telemission SHIem) It is also stated in Patent No. 4,782.383. This method is described, Another paper written by Isnadi (M, A, I+nx+di) Minchi I.E.E. Transactions O. issued in December 1987. IEEE Tunsacjions on B+o xdca+ling), volume BC-33No, 4, page 116-1 For compatibility and reproducibility in the rACTV system listed on page 23 Encoding lot Compatibility and Rscovs+abilif71nthe ACTV Sysjtm) This is a paper that The systems described in these reference publications are A single channel of 6 MHz is used to transmit the TSC signal.

When this signal is processed by a normal NT'SC receiver, a normal television image is produced. will be accomplished. However, this signal is processed by a receiver that decodes and synthesizes various component signals. Processing produces high-quality widescreen images. Basic NTSC trust The component signals that emphasize the signals are the underutilized parts of the NTSC spectrum. assigned to. This high-definition widescreen image is a normal television image. It has higher horizontal and vertical definition than the image and is overall very visible to the viewer. It is easy to use, but the resolution in diagonal directions is relatively low. Additionally, the overall definition is comparable to that of a movie film. lower than mu.

Summary of the invention Therefore, the definition of the reproduced image is increased to a level almost comparable to that of movie film. It is desirable to provide a system that uses auxiliary signals Since the present invention utilizes the configurations of the well-known Bell system and NAP system, A system that generates encoded main and auxiliary signals representing high-definition images. A video source that is based on a video source and that provides a high-definition video signal; and compatible codes for reception and display by conventional television receivers. a first signal encoding means for generating an encoded primary video signal, associated with the video source; and the main video signal in a special receiver to produce a widescreen display. a second signal code generating an encoded auxiliary video signal suitable for being combined; means for encoding, and a first channel carrying said encoded main video signal; two transmission channels, a second channel carrying the encoded auxiliary video signal; It includes a transmission means consisting of: The present invention provides that the first encoding means generates The main video signal contains widescreen information and the fine definition of a traditional video image. Enhanced image with a higher definition than that of the high-definition image but lower than the definition of the high-definition image It is characterized by expressing A decoding means is coupled to the first signal encoding means, the decoding means being coupled to the first signal encoding means; Decode the encoded main video signal and generate the decoded main video signal . the signal difference generating means is coupled to the decoding means, a video input provided by the video source; signal and the decoded main video signal supplied from the decoding means. generating a difference signal representative of the difference, said second signal encoding means in said signal difference generating means; combined to produce the encoded auxiliary video signal representative of the difference signal.

The principles of the present invention also provide that encoded signals received from the first analog transmission channel are The encoded video signal is received from the main video signal and the second analog transmission channel. first and second receiving means for respectively providing auxiliary video signals, said Each video signal is obtained from a high-definition source and the encoded main video signal is received and displayed on a conventional television receiver with a standard aspect ratio. The received video signals are decoded and synthesized to produce high-quality video. a television signal processing system comprising signal processing means for generating an output signal; It is also embodied in According to the invention, this system is called the first receiving The encoded primary video signal provided by the means includes widescreen information. The high-definition source has a higher definition than that of conventional video images. It is characterized by representing high-definition television images with a lower definition than be.

The auxiliary signal is a widescreen high definition encoded main video signal. represents the difference between the encoded video signal and another signal that is decoded from the encoded main video signal. It's something I'm afraid of. The signal processing means is coupled to the first receiving means and the signal processing means is coupled to the first receiving means to receive the encoded main signal. generates a decoded baseband primary video output signal in response to the video signal It includes main signal processing means. Auxiliary signal processing means are coupled to the second receiving means. in response to the combined and encoded auxiliary video signal and outputs a baseband additional output signal. Occur. coupled to each one of the main signal processing means and the auxiliary video signal processing means. The combining means having first and second inputs is configured to receive the main bits of the decoded baseband. The video signal and the baseband additional signal are combined by adding to produce widescreen video. represents a video image and has a higher definition than the definition of the high definition television image. generates a video output signal.

The scope of the claims 1. A system that generates encoded main and auxiliary signals representing high-definition images. a video source (110') that is a system and provides a high definition video signal; coupled to said video source for reception and display by a conventional television receiver. first signal encoding means for generating an encoded main video signal compatible with (114) and A special receiver is associated with the video source to produce a widescreen display. an encoded auxiliary video signal suitable for being combined with said main video signal in an imager; second signal encoding means (142) for generating a signal of the encoded main video; a first channel carrying a signal and a second channel carrying said encoded auxiliary video signal; a transmission means consisting of two transmission channels of channels; The main video signal generated by the first encoding means (114) is a wide Contains screen information and is of higher definition than traditional video images represents an enhanced image whose definition is lower than that of the high-definition image, and the decoding means (140 ) is coupled to said first signal encoding means and encodes said encoded main video signal. decoding and generating a decoded main video signal, the signal difference generating means said video input signal coupled to means and supplied from said video source (110); representing the difference between the decoded main video signal supplied from the decoding means; the second signal encoding means (142) generates a signal difference signal; and generating the encoded auxiliary video signal representative of the difference signal. The system characterized in that:

2. The second signal encoding means (142) generated by the signal difference generating means; The difference signal encoded by contains both luminance and chrominance components. and the encoded main video signal supplied from the first signal encoding means (114); A predetermined signal is selected from a group including NTSC, PAL and SECAM. Interlaced line and field frequencies that match the television broadcast standards of System according to claim 1, characterized in that it is of the type.

3. The input video signal occupies a frequency band of 0) 1z-L MB2, The first signal encoding means processes the input video signal and processes OH! -K MB A filtered video signal occupying a frequency band of 2 (however, K is smaller than comprising low-pass filtering means (19a) for generating; The signal difference generating means generates the difference signal occupying a frequency band of OH2-LM)1g. occurs, The second signal encoding means, 0Hr-J　First component signal (A) occupying the frequency band of MB2 and J　M The frequency of B2-HMl (! (However, J is smaller than H, and H is not larger than H) means (2244, 2) for separating the difference signal into a second component signal occupying several bands; 246, 2248) and Encode the second component signal and occupy the frequency band of OH2-J MB2 means (2250, 2252) for generating an encoded second component signal; The first component signal and the encoded second component signal are time-division multiplexed, and OH the auxiliary encoded video signal occupying the frequency band of System according to claim 1, characterized in that it comprises means (Sl) for generating.

4. The input video signal is interlaced scanned with N (where N is an integer) lines per frame. is a signal, The first signal encoding means encodes M per frame (where M is an integer not larger than N). (1) means (1) for converting said input video signal into a line progressively scanned intermediate video signal; 6) and encodes the intermediate video signal with an interlaced scanning signal of M lines per frame. means (114) for generating said encoded main video signal; , the encoding means processes the encoded main video signal to generate a video signal per frame. means for generating said decoded main video signal which is an M line progressively scanned signal; (1450), The difference generating means generates the encoded main video signal from the input video signal. subtracting and including means for generating said difference signal of 2M lines per frame. The system of claim 1, characterized in that:

5. The encoded main video signal received from the first analog transmission channel. and an encoded auxiliary video signal received from a second analog transmission channel. first and second receiving means (2902, 2522) respectively supplying , the video signals are each obtained from a high definition source and the encoded main video signal is The video signal is received and displayed on a conventional television receiver with a standard aspect ratio. The received video signals are decoded and synthesized to provide high image quality. a signal processing means for generating a video output signal; the encoded main signal supplied from the receiving means (2902) called first; The video signal contains widescreen information and has less definition than traditional video images. a high definition image having a higher definition than that of said high definition source; the auxiliary signal represents the encoded main video signal. widescreen high-definition signal and the encoded main video signal. represents the difference between a signal decoded from another signal, The signal processing means coupled to said first receiving means and responsive to said encoded primary video signal; main signal processing means (2) for generating an encoded baseband main video output signal; 9゜4) and coupled to said second receiving means (2522) and said encoded auxiliary video signal; auxiliary signal processing means (290) for generating an additional baseband output signal in response to 6) and the main signal processing means (2904) and the auxiliary video signal processing means (2906); the decoded baseband having first and second inputs coupled to each other; The main video signal of the baseband and the additional signal of the baseband are combined by addition, and the wide Represents the video image of the screen, said higher definition than the definition of the television image. Synthesizing means (2908°2910.) for generating a video output signal with high definition. 2912).

6. The auxiliary signal includes first and second component signals, and the first component signal represents a first addition to said main video signal and represents a first frequency band; and the second component signal represents a second addition to the main video signal. and occupying a second frequency band, the second frequency band of the second component being said second frequency channel so as to occupy the same frequency band as said first component. frequency shifted for transmission in the second channel, and the component is shifted in time in the second channel. the auxiliary video signal is divided and multiplexed, and the auxiliary video signal processing means comprises: means (2718) for separating into the first and second component signals; means (2720-2744) for decoding the second component signal; The first component signal and the second decoded component signal are combined to generate the baseband signal. means (2716) for generating an additional signal of the command. 6. The television signal processing system according to claim 5.

7. The first component signal (A) of the auxiliary video signal is OHx~NMHt. OH! representing the addition of the main video signal in a frequency band. ~N MHz Contains signals occupying the wavenumber band, The second component signal (B or C) of the auxiliary video signal has a frequency of NMHz to The main video in the frequency band P MHz (where P is greater than N) OH2-N Ml (including signals occupying the frequency band of !) It's here, The first and second component signals of the auxiliary video signal are In the case of a static sequence of images, a predetermined number of fields G (where G is an integer) per second is generated. the auxiliary video signal is time-division multiplexed at a frequency equal to that of the high-definition television; contains only the first component signal for the motion sequence of the John image; The auxiliary signal processing means is coupled to said main video signal processing means for processing a motion sequence of said high definition television picture; means (2711) for generating a motion signal indicating a can; a demultiplexer for separating the first and second component signals from the auxiliary signal; means (2710, 2718); coupled to said demultiplexing means for processing said second component signal to obtain said second component signal; NMH! - a frequency-shifted second component signal occupying the frequency band of the PML; a frequency conversion means (2720 or 2722) for generating a frequency, and the demultiplexer. the movement means (2710) and includes signal storage means (2714); selecting said first component signal for alternating periods of G fields in response to generation of a signal; means (2714) for selectively and repeatedly generating a first component signal; coupled to said demultiplexing means and said frequency conversion means, said motion signal in response to said occurrence of said frequency shift for alternating periods of said G field periods. selectively repeating the frequency-shifted second component signal to generate a frequency-shifted continuous second component signal. means (2738) for generating a component signal of; the continuous first component signal and the frequency-shifted continuous second component signal means (2716) for synthesizing the baseband signals and generating the baseband additional signal. The television signal processing system according to claim 6, characterized in that:

8. Claim characterized in that the G field periods are equal to one frame period. 8. The television signal processing system according to item 7.

9. The second component signals of the auxiliary signal are OR1-NMH! frequency of comprising first and second sub-component signals (B, C) occupying a band; The subcomponent signal (B) is the main component signal (B) in the frequency band of N The second sub-component signal (C) represents the addition of the QMH! ~P MHz represents the addition of the main component signal in the frequency band of the first and second component signals. The side signals are line-based and time-division multiplexed; The frequency conversion means, Modulate a carrier wave signal of N MHz with the first sub-component signal to obtain N MHI to Q M means for generating a frequency shifted first subcomponent signal occupying a frequency band of Hz; stage (2720) and the second sub-component signal QMll! modulates the carrier signal of , QMH! -MMH! a frequency-shifted second subcomponent occupying a frequency band of means for generating a signal (2722); and means for accumulating a signal; The lines of samples for the first subcomponent signal Means (2724, 272) for generating a wave number shifted continuous first sub-component signal 8,) and a signal storage means for the frequency-shifted second sub-component signal. repeats alternating lines of samples with a frequency shifted continuous means (2726, 2730) for generating a second component signal; the frequency-shifted continuous first and second sub-component signals; and means (2732, 2740) for generating two component signals. The television signal processing system according to claim 8.

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Claims (1)

[Claims] 1. encoded main and subsignals representing high-definition widescreen images. a system that generates images of substantially higher definition than that of traditional video images; an input video signal source (110) representing the high-definition widescreen image; )and, coupled to said input video signal source and said high definition video image is higher than that of a conventional video image; Definition Represents an enhanced image that has a definition lower than that of the widescreen image first signal encoding means (114) for generating the encoded main video signal; , coupled to said first signal encoding means for decoding said encoded main video signal; decoding means (140) for generating a decoded main video signal; a difference between said input signal and said decoded main video signal; signal difference generating means for generating a difference signal representing; said encoded sub-video coupled to said signal difference generating means and representing said difference signal; and second signal encoding means (142) for generating a second signal. 2. The first signal encoding means is configured to encode a conventional video signal in response to the input video signal. a first video signal representing an image and an enhancement for said conventional video image; means (38, 64, 76, 79) for generating a second video signal; and a second video signal to generate the encoded main video signal. A system according to claim 1, comprising a stage (80, 40, 57). 3. the input video signal occupies a frequency band of OH2 to LMH2; The first signal encoding means processes the input video signal and outputs OH2 to KMH2. generates a filtered video signal that occupies a frequency band of The signal difference generating means includes a low-pass filtering means (19a) to generating said difference signal occupying a frequency band of LH2; The second signal encoding means, The first component signal (A) occupying the frequency band of OH2 to JMH2 and JMH2 to H Occupies the frequency band MH2 (however, J is smaller than H, and H is not larger than H) means for separating the difference signal into a second component signal (2244, 2246, 22 48) and A code that encodes the second component signal and occupies a frequency band of OH2 to JHMH2. means (2250, 2252) for generating an encoded second component signal; The first component signal and the encoded second component signal are time-division multiplexed, and OH generating said sub-encoded video signal occupying a frequency band of 2 to JMH2; 2. A system according to claim 1, comprising means (S1) for: 4. The input video signal is an interlaced system with N lines (N is an integer) per frame. , and the first signal encoding means sequentially encodes M lines per frame. means (16) for converting said input video signal into a scanned intermediate video signal; and said intermediate video signal. M per frame (where M is an integer not larger than N). ) means for generating said encoded main video signal which is a line interlaced signal; (114), wherein the decoding means includes the encoded main video signal The decoded main bits, which are progressive scanning signals of M lines per frame, are processed. means (1450) for generating a video signal; The difference generating means generates the decoded main video signal from the input video signal. and generating said difference signal having 2M lines per frame. The system according to claim 1, characterized in that: 5. Claim 4, characterized in that N is equal to 1050 and M is equal to 525. system. 6. High-definition television images with higher definition than traditional video images means (2902) for receiving an encoded primary video signal representing an image; first and second frequency bands for said main video signals occupying first and second frequency bands. receiving an auxiliary signal having first and second component signals representing a second auxiliary signal; means (2522) for determining, wherein said second component signal is approximately equal to said first component signal; the first and second component signals are encoded to occupy the same frequency band; The signals are time-division multiplexed, coupled to receive the encoded primary video signal; main signal processing means ( 2904) and coupled to receive the auxiliary signal and then the first and second component signals. means for decoding said second component signal (2718); and means for decoding said second component signal (272). 0-2744) and the first component signal and the decoded second component signal. auxiliary comprising means (2716) for combining and generating baseband additional signals; Video signal (2906) processing means; coupled to the main signal processing means and the auxiliary signal processing means; The encoded main video signal and the baseband additional signal are combined to produce the high-quality video signal. output signal representing a video image having a higher definition than that of the television image. a two-channel television signal, characterized in that it includes a combining means for generating a signal. issue processing system. 7. The first component signal (A) of the auxiliary video signal is in the band OH2 to NMH2. occupies the frequency band of OH2 to NMH2 representing the addition of the main video signal in the area. contains a signal with The second component signal (B or C) of the auxiliary video signal is NMH2 to PMH Adding the main video signal in a frequency band of 2 (where P is greater than N) The auxiliary bit signal includes a signal occupying the frequency band of OH2 to NMH2 representing the auxiliary bit. The first and second component signals of the video signal are static signals of the high definition television image. Time division multiplexing on the basis of G (where G is an integer) field for stop sequences and said auxiliary video signal is related to a motion sequence of said high definition television images. and includes only the first component signal, The auxiliary signal processing means coupled to said main video signal processing means for processing a motion sequence of said high definition television picture; means for generating a motion signal indicative of a can; a demultiplexer for separating the first and second component signals from the auxiliary signal; means (2710, 2716); coupled to said demultiplexing means for processing said second component signal to obtain said second component signal; a frequency-shifted second component signal occupying the NMH2-PMH2 frequency band; a frequency conversion means (2720 or 2722) for generating a signal storage means (2728) coupled to the motion signal means; selectively repeating said first component means during alternating periods of G fields in response to means (2724) for generating a first component signal; signal storage means (2740), said demultiplexing means and said signal storage means (2740); coupled to frequency conversion means, responsive to the motion signal, and configured to convert the G-field period to an alternating period; selectively repeating the frequency-shifted second component signal for a frequency period of means (2738) for generating a shifted continuous second component signal; combining the continuous first component signal and the frequency-shifted second component signal; , and means (2716) for generating the baseband additional signal. The television signal processing system according to claim 6, characterized in that: 8. Claim 7, characterized in that the G field period is equal to one frame period. The television signal processing system described in . 9. The second component signals of the auxiliary signal each have a frequency band of OH2 to NMH2. the first and second auxiliary component signals (B, C) occupying the area; The auxiliary component signal (B) is the main video signal in the frequency band of NMH2 to QMH2. The second auxiliary component signal (C) represents the addition of a signal, and the second auxiliary component signal (C) is the frequency of QMH2 to PMH2. represents the addition of the main component signal in the wavenumber band, and the addition of the first and second auxiliary components; The minute signal is time-division multiplexed on a line basis, and the frequency conversion means comprises: modulating the carrier signal of NMH2 with the first auxiliary component signal; Generates a frequency shifted first auxiliary component signal occupying the frequency band of MH2 means (2720) to Modulating the carrier signal of QMH2 with the second sub-component signal, QMH2~MM A means of generating a frequency shifted second sub-component signal occupying the frequency band of H2 Step (2722) and a signal storage means for said frequency shifted first sub-component signal; repeating alternating lines of samples of means (2724, 2728) for generating subcomponent signals of; and signal storage means; a line of samples for the frequency shifted second subcomponent signal; means for generating a continuous alternating frequency-shifted subcomponent signal; (2726, 2730) and the frequency shifted consecutive first and second means for synthesizing the sub-component signals and generating the frequency-shifted second component signal ( 2732-2740) The television set according to claim 8, john signal processing system.