JPH04503592A - High definition B-MAC television signal transmission system - 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 B-MMC television signal transmission system Gigai field The present invention relates to the field of transmission systems for television signals, in particular standard resolution those transmitted after the NTSC format or the European format. TV signal for transmitting signals that provide higher resolution images between transmission systems.

Juren Techniques ±Ω Theory Television signals that increase image clarity in both horizontal and vertical dimensions There is growing interest in the transmission of issues. In the vertical dimension, such signals are Compared to the standard one, it has twice the number of scan lines, while in the horizontal dimension In this case, the number of pixels per scan line has been similarly increased. Standard horizontal and vertical As a result of providing direct resolution, the transmitted signal is negatively affected when displayed on a wide screen. will occur. For standard traffic lights, people looking at the signal must be relatively close to each other. In some cases, you may complain about blurry or unclear image quality. The impact can be overcome by higher resolution images, but traditional transmission systems systems cannot be easily adapted to transmit high resolution images.

The challenge of providing high resolution images without increasing the bandwidth required for signal transmission One solution to this problem is US Pat. No. 092.30, filed on September 2, 1987. It is explained in No. 5. The high resolution signal is diagonally filtered and The Tsuoki sample is a figure-of-five image sample. Or follow digital sampling techniques to leave a quincunx. and is erased on every other scan line. Odd scan line samples are even scans added to the line samples to form the scan line sum signal. skew-sy smetrical) filtering technique to obtain information in the diagonal direction of the limit value. The high-resolution horizontal information region of the signal that normally carries the information is filtered. Ru. The loss of diagonal information from the transmitted signal is due to the origin input to the transmitter. does not cause any appreciable disturbance to the digital high-resolution images, but only Only scan line storage is required at the transmitter.

No field storage is required; furthermore, no field storage is required at the receiver. Digital filtering is relatively expensive compared to prior art interpolation techniques. It is.

Another solution to the challenge of transmitting high-resolution images is the standard It is to transmit the 5-in-1 signal and create a so-called reinforcement channel for transmission. . According to the first solution mentioned above, a new A new receiver is required. According to this solution, you receive standard resolution images. No part of the receiver circuitry is changed to display the the high-resolution data into a standard-resolution image. A separate adapter circuit is required to construct and provide high resolution images.

A method and apparatus for enhancing the quality of an NTSC video signal using an enhancement channel Regarding this issue, see U.S. Patent Application No. 228.274, filed August 4, 988. It has been made clear.

According to the approach taken in that application, both the scan line sum signal and the scan line difference signal are is formed from high-definition television signals. For intermediate video signal bandwidth High-resolution water is obtained by reversing every other sampling The horizontal information is converted to baseband and attached to the high resolution vertical information from the scan line difference signal. and are transmitted together as necessary enhancement channels.

However, none of these approaches compares favorably with standard definition television signals. Although it has increased horizontal and vertical resolution compared to Conventional MAC reception is used to receive a composite signal of multiple analog components (MMC) of image quality. Transmits high-definition MAC television signals that do not require modification of the jS/decoder It does not provide solutions to the problems faced.

In the 1970s, sub-Nyquist sampling techniques were used for independent broadcasting. Applied to the technology of digital television by the inventor and his colleagues at the Corporation Ta.

Digital technique to remove aliasing (P-3-15), “Sub-Nyx” by Mr. H. Barad and the inventor of the present application It is explained in the paper titled ``Sampling Methods.'' J”, Mr. Taylor ``Digital Sub-Nyquist Filter'' In order to optimize the signal sampling in the PAL television signal About comb filters for down-conversion and up-conversion of video data that can be used in environments such as It is explained. These anti-aliasing digital sampling techniques The technique provides a basis for development to improve horizontal resolution. However, the amount of data transmitted How to improve both horizontal and vertical resolution of heavy analog component television signals Requirements still remain in the technology of the law and equipment.

Light plate■! about The present invention transmits high quality multiplexed analog component (MAC) television signals. RECEIVING METHOD AND APPARATUS. B-type MAC transmission format for composite signal transmission If so, the video signal is being carried during the valid line period, while at least the audio All other signals consisting of data, control data, equipment data and teletext are connected to the line. ・Transmitted during blanking period or longer field blanking period There is.

Separate luminance and chrominance signals are digitally sampled on separate parts of the video line signal. is sampled, compressed and transmitted according to the well-known B-MAC format. , the luminance samples are compressed for transmission with a ratio of 3:2, while the chrominance samples are Compressed at a ratio of 3:1. Chrominance information is transmitted on every other line. It is converted into a U component and a V component.

generally within the boundaries of the multiplexed analog component format and to the method of the present invention. Therefore, in order to achieve high resolution video information transmission, high horizontal resolution information Folding is a high-frequency diagonal of the sampled video signal. Diagonal components.　5MH 2 (7MHz when time compressed to 3:2 according to the formant) At baseband frequencies, the spectrum is unchanged, thus e.g. B - An MMC decoder typically has a 5.3MHz passband low-pass at its input. Since it is equipped with a filter, the folded high-resolution information does not affect reception. Additional transmitted information at high frequencies is simply blocked and ignored.

In particular, according to the transmission method of the present invention, high-definition analog television signals are first 28[IMz　(3,58MHz or 8 times the rate of 8Fsc color subcarrier) orthogonally sampled, As a result, a two-dimensional sample spectrum is obtained, which is then divided into diagonal frequencies diagonal digital filter that reduces the response filter). The decrease is actually imperceptible to the viewer. It is something.

The diagonally filtered data is then filtered for every other line on every other line. decimate by discarding the sample, resulting in 5 figure-of-five or quincunx A sample pattern remains. As a result of deleting every other sample, the baseband The spectrum remains unchanged, but the horizontal and vertical resolution components A high-resolution repeat spectrum consisting of The zero repetition spectrum that exists between the pulling frequency 2 and its sampling frequency is , which acts to fold additional resolution into the baseband signal.

The folded signal samples are then converted to analog form and centered at 7MHz. Low-pass skew-symmetrical filter er) or similarly digitally filtered. Therefore, the horizontal order The originally related high-resolution information is 7 MHz diagonally to about 5-7 MHz, and is folded into the high frequency part of the passed baseband signal. As a result, high-resolution information information is exchanged with diagonal information.

According to the transmitting device of the invention, the digital diagonal filter of the encoder has separate horizontal frames. It consists of a filter and a vertical filter. The vertical filter at the transmitter is If the filter is complex enough to provide 40db rejection in the stop band, then It will be very simple. For example, the transmitter's horizontal filter (passing 0-5MHz) (allowing bandwidth) can be at the level of complexity of 16 coefficients. in the transmitter In addition to allowing a very simple vertical filter to become a diagonal filter, The result of using a complex horizontal filter in is a much cheaper and simpler diagonal filter. In particular, filtering structures may be used in the transmitter, - The pass filter needs to consist of only 8 coefficients. Improving the horizontal detail of the degree The technology and equipment are explained by Chromi. Efforts are made to improve the horizontal detail of the nonce.

An example for improving horizontal detail in chrominance is to improve horizontal detail in luminance. Similar principles are applied to the embodiments applied to improve them. however, B-MMC signal for intentional enhancement in horizontal chrominance detail. is considered unnecessary for chrominance transmission and is simpler for chrominance transmission. It provides techniques.

The vertical filter/interpolator has a 1:1 jump of 525 lines at its input. 1050 lines with a 2:1 jump, or 1125 lines. Receive a signal with a 2:1 jump on the line. The signal is vertically Properly filtered with 4:1 line decimation n) An output is provided to the circuit. The output of the line deletion circuit is 2.5M1 (Z A sample of the high frequency output, filtered in the horizontal dimension with respect to the center frequency is provided to the multiplexer. Multiplexer selects chrominance for transmission , combines the luminance and data/audio signals. However, prior to sending, combine The resulting high-quality B-MMC signal is combined with the preferential filter section in the decoder to be decoded. 10.7 Eliminating Aliasing (aHac3ng) in Coded Signals It is passed through a diagonally symmetrical filter centered on MH2. The result is the same for the encoder. A diagonally symmetrical filter section is assigned to both luminance and chrominance processing.

Sonosara Hikoku Dankyu Sesho FIG. 1 is a graphical illustration of vertical versus horizontal sharpness of a high definition television signal.

Figure 2 shows 28.6MH2 (8Fsc after pre-filtering at 9.0MHz) displays the orthogonal sampling grid for sampling the signal in Figure 1. ing.

Figure 3 shows that the baseband spectrum results and at the same time the repetitive spectrum The orthogonal sampling group and ring shown in Figure 2 are arranged so that FIG. 3 is a graphical representation of vertical vs. horizontal sharpness as a result of applying the contrast.

Figure 4 shows that the diagonal information, for example the data block between 5MHz and 9.2, is shown in Figure 3. Vertical vs. horizontal filtered from orthogonally sampled spectra of It is a graph diagram of sharpness.

Figure 5 shows that every other line is A 14 MHz sampling group formed by discarding every other sample on the Showing lid.

In addition to the repeat spectrum at 28 M) Iz, Figure 6 shows the 2 at 14 MHz 1 repeat spectrum and an initial sampling rate of 2 are introduced. FIG. 2 is a graph diagram showing the results of decimation of every other sample. Ru.

FIG. 7a shows the approximately 7 Vertical versus horizontal graph diagram showing the filtering process with respect to the center frequency in MHz. 7b is a graph of its characteristic amplitude versus frequency response.

FIG. 8 is a graphical representation of the first step of the process accomplished in the receiver, and FIG. Sample again at 14MHz using the figure 5 pattern shown in By multiplying the folded high-resolution horizontal dimension information, It's back to high frequency. Figure 8a shows a first graphical representation of vertical versus horizontal sharpness. , Figure 8b shows how aliasing is eliminated and how 7b This shows how information close to MHz is reproduced by the diagonally symmetrical characteristics of the filter. FIG. 2 is a graph of amplitude versus frequency.

Figure 9 shows the vertical vs. horizontal results of the 14 MHz to 28 MHz hairtube conversion. This is a graph of sharpness in the range of 5 to 9M) when subjected to diagonal filter processing. A zero is formed for high diagonal frequencies. Leaves a signal with high horizontal resolution However, the diagonal information only suffers an imperceptible cost.

Figure 10 shows a transmitter equipment for encoding high-quality B-MMC television signals. This is a general route map of the station.

Figure 11 is a schematic diagram of a receiver device for decoding high-definition television signals. be.

Figure 12 shows a horizontal row of 16 coefficients containing the coefficient data shown in Figure 10. - shows a graph of the characteristic response of the pass filter.

Figure 13 shows an 8-coefficient horizontal low pass containing the coefficient data shown in Figure 11. Figure 3 shows a graph of the characteristic response of the filter.

Figure 14 is used in a 1125 line MUSE signal transmission system. For the results of more expensive multi-field storage technology, in B-1'lAc The present invention combines conventional but proprietary scan conversion and line doubling techniques. It shows the characteristics of the application and shows the vertical resolution in lines per screen height versus lines per screen width. 3 shows a graph of horizontal resolution at the inn.

Figure 15 shows three filters to which the technology of the present invention is applied, a diagonal filter, and a spare filter. Graphs of amplitude vs. frequency and horizontal vs. vertical resolution for the filter and the diagonally symmetrical filter. 15a is a graph of amplitude versus frequency, and FIG. 15b is a graph of vertical This is a graph of horizontal resolution versus horizontal resolution.

FIG. 16 is a graph of the two-dimensional contour response of the transmitted signal, which can be compared to FIG. FIG. It is.

FIG. 17 shows the luminance processing circuit at the location of the high quality B-MMC encoder according to the present invention. This is a block outline map.

FIG. 18 shows the chrominance at the position of the high quality B-M^C encoder according to the present invention. FIG.

FIG. 19 shows the high quality B-? according to the present invention. Blocking of processing at the IAC decoder location This is a rough route map.

Figure 20 shows a high-definition TV processing the output of the high-definition B-MAC decoder in Figure 19. It is a block outline diagram of a vision receiver.

Figure 21 is a high-definition system that has many applications in high definition or standard definition television environments. 1 is a schematic block diagram of a high quality television receiver.

Kumen zaheheki theory■ Referring to Figure 1, a high-definition image is plotted graphically in vertical versus horizontal resolution. A revision signal is illustrated.

According to Figure 1, high-quality images were scanned sequentially using 525 lines. The present method is applicable to images with an aspect ratio of 16:9. horizontal resolution has at least 945 lines at 9MHz. This kind of sequence The digital scanning signal supports a vertical definition of 480 lines.

With this signal as input, this description uses, by way of example, diagonal resolution (diag increased at a slight sacrifice of hydration to the point where the onalvesolu 5 ion) cannot be detected. It refers to a new type of B-MMC signal that is responsible for enhanced resolution. However, it is It is equally applicable to other multiplexed analog component video signal transmission systems. enhanced The resulting resolution is folded into high video frequencies. 5MHz (time compression in MAC) 7M) Iz) At lower paceband frequencies the spectrum changes. Not done. The known B-MMC decoder is a rotor that limits the passband to 6.3MHz. - has a pass input filter, so the decoder operation is dependent on the additional transmitted information. unaffected by information. On the other hand, B-? according to the present invention? lAC decoder Replay the included horizontal detail information (detail 1nfors+ation). image and decode it so that the high-resolution image is displayed by the receiver.

A standard resolution 525 line 2:1 interlaced video signal has 240 lines each. It consists of two fields containing valid lines. All 480 pieces available every other (odd number) so that the effect lines are regularly spaced above the display screen. ) field lines are spatially offset with respect to even field lines has been done.

In principle, this line configuration has a vertical It can play a role in resolution. However, this value is not achieved with normal interlaced display. No, the reason for this is that only 240 lines are displayed in each field. This is due to the fact that the human eye/brain has two fields combined that make up all four fields. Detects 80 lines. It is not possible to do this completely, it is perceived by the eyes/brain. The strength of the first field reached is when the second field arrives (1/60 seconds later). By then, it had decreased to 50% of its initial value. This has two results. are doing.

(i) The line configuration becomes visible on the disk blade.

(ii) Vertical frequencies beyond 240 lines are partially eliminated on the display. Ashing is done.

The net result is no perceptible drop in the standard resolution 525 line interlaced display. The direct resolution is somewhere between 480 lines and 240 lines. . The reduction from 480 lines is to introduce the concept of the so-called "Kell coefficient" This has been previously explained.

Perceived resolution - 480X0.66 (Kell coefficient)...320 lines For still images, the Kel coefficients are completely removed and each field period of 1/60 second to display all 480 lines (lines from odd and even fields) This restores the resolution to 480 lines. This technique is known as scan conversion. It is. The application of this technique is to move information between fields. Field storage memory for storing 40 active lines and 2 of normal line frequency Includes use with double viewing. However, important movements occur between fields. Therefore, the method can be directly applied only to static parts of the image. Therefore, Moshi Run detectors also use field-to-field interpolation for stationary objects; Required as inserts are used for moving objects. adaptive field storage The scan conversion technique using the line doubling technique thus provides vertical resolution for still images. Achieved 480 lines for image resolution and approximately 320 lines for dynamic areas where the image is moving. to be accomplished.

Line doubling of field memory has become a standard method for enhancing vertical sharpness. It is accepted by the settoka on Tν. Its main advantage is that it The point is that the line structure is removed without transmitting any additional information, and the image quality is significantly improved. .

Some manufacturers of TV receivers and projectors have proprietary line doubling technology. These include Philips, Hitachi, Sony, Terrestrial, etc. its obvious advantages (i) This technique does not apply to data received from any source, including a 5-VB2 VCR. It applies equally to component signals (luminance, chrominance) and NTSC signals.

(11) This technology is applied to television receivers and therefore TV cents ( Allows retention of 525 interlace connections to NTCS or wide IF range Y/C).

(City) Field storage in TV set image projectors is Used for image insertion and other consumer special offers like noise reduction.

(1v) This technology does not require any additional transmission information, and The high-definition television (HDTV) format is said to enhance horizontal clarity. It allows me to concentrate on the task.

``Method and Apparatus for Improving Vertical Clarity of Television Signals by Scan Conversion'' U.S. patent application filed on October 11, 1988 by Christopher Birch with the title Application No. 255.328 describes how to deploy multiple alternating interpolated values for display. Test video signals for open shading, motion and vertical edge modulation Improve the vertical resolution of your television signal by selecting specific values according to The technique to do this is explained.

In order to solve the problem of increasing horizontal resolution, the present high-definition 11Ac system is developed. The system uses sub-Nyquist resolution to exchange diagonal resolution for enhanced horizontal resolution. A sampling method (spectral folding method) is used. Regarding the process , described in conjunction with FIGS. 2 to 9, and its use in a transmitter or receiver. The apparatus will be described in conjunction with FIGS. 10 and 11. all cited The frequency (bandwidth and sampling frequency) is the compressed value of the B-MAC signal. etc. in the 0 time compressed (MMC) domain referring to no luminance signal. The value bandwidth and sample frequency are enhanced by a factor of 1.5 (3:2). There must be.

The 2:1 skipped luminance signal of 525 lines is passed through a low-pass analog filter. The band is first limited to 9 MHz using a Briefly referring to Figure 10, The filter is described as an 8.7 MHz pre-filter. this band The width (BW) is 945 lines per increment M (FW) calculated as follows. It is wide enough to achieve horizontal resolution.

This signal uses an orthogonal sampling grid as shown in Figure 2. The signal is initially sampled at 28.6 MHz (8 Fsc). orthogonal sampling According to the results and Figure 3, the baseband spectrum centered at the sampling frequency is vectors and repeating spectra result. its baseband spectrum at frequencies as high as 9 MHz or as high as 945 lines as calculated above. It consists of horizontal resolution components.

The diagonal digital filter reduces the diagonal frequency response (step 2) by 1, The zero-separable horizontal and vertical filters applied in Figures 10 and 11 It is used for convenience as further explained in connection with the discussion. See Figure 4. In contrast, blocks of diagonal (horizontal vs. vertical) information are part of the baseband spectrum. and removed at horizontal frequencies between 5MHz and 9MHz in the repeating spectrum. It will be understood that

Now, every other sample is about 14 listens (4Fsc) without aliasing. It is abandoned to leave a sample pattern of "quincunx" (figure 5). Fifth According to the figure, every other sample on every other line has been deleted.

The results of step 3 are based on a sampling frequency of 14 MHz for every other sample deletion step. There is a repetitive spectrum in wavenumbers, shown in Figure 6. A sequence of digital samples with a two-dimensional spectrum.

Prior to transmission, horizontal resolution improvement information is folded into the transmitted signal. For example, sump The signal is converted to analog form and passed through a transmit filter with specific characteristics.

The analog transmit filter has a diagonally symmetrical low-pass response of 6dB at 7MH2. has. The results show that high-resolution information at 7-9 MHz is The void formed by diagonal filtering As an alternative to 0 shown in Figure 7a, which has been transformed to satisfy the digital Non-recursive filters are used to convert from digital to analog. Eliminates the need for conversion or upconversion to 28MHz sampling as further described herein.

Effectively, the horizontal resolution between 7MHz and 9MHz is folded around 7MH2. It also replaces diagonal resolutions between 5MHz and IMHz. 7th According to figure b, the filter characteristic response is shown at 6 dBo) attenuation at 7 MHz. ing. In multiple analog component (MAC) transmission, the transmission filter is time compressed. It should be noted that it is diagonally symmetrical with respect to 1,5X7MHz due to the coefficient (3:2). It is possible. This signal is now ready for transmission, step 5.

When a signal is received, every other quincunx (figure 5) sampling pattern is sampled again at 14 MHz (step 6). At 14MH2 By re-sampling, the high frequency information changes from 7 to 9Mh according to Figure 8a. exchange occurs.

The resampling process thus reduces the horizontal energy between 7 MHz and 9 MHz. play ghee. Referring to Figure 8b, in the transmit filter for 7MHz If the transmit filter combined with decoder processing has a diagonally symmetrical response: A +(1-A)-1, it is further compensated by the aliasing ring A.

In other words, the introduced aliasing ring has a close overlap of 7MH2. No matter where the amplitude A is measured between the dotted line and the solid line area, it will inevitably be canceled. It will be done.

The spectrum in Figure 8 is applied to a 14 MHz sequence of 5-point samples. Ru.

The rest is up-converted to 28MHz to remove residual energy in the diagonal. For this purpose, a two-dimensional filter is introduced and the signal is band-limited to 9MFIz.

The diagonal filter (which produces zeros at high vertical frequencies in the range of 5 to 9 times 2) is 14 This cannot be done with a sample rate of MHz, so the application of a sample rate of 28MHz • 7p conversion occurs as part of the digital filtering process. According to figure 9 , up-conversion and diagonal filtering are improved with zeros at diagonal frequencies. horizontal resolution.

Step 7 is to collect a series of samples at 28MHz with an orthogonal sampling grid. Deliver as a result. It has a horizontal resolution of 9MHz without aliasing. These samples are useful for direct conversion to analog format. Can be used. After band-limiting to 9MHz, the analog signal is displayed on a high-definition receiver. It will be done.

Instead, Mr. Christopher Birch's Titled ``Method and Apparatus for Improving Vertical Clarity of Televised Signals by Scanning Conversion'' No. 255,238 and loosely used herein. A well-known but proprietary frame for line doubling to enhance vertical clarity such as equipment passed directly to the field storage scan converter. The result of scan conversion is 56MHz (2 X28MHz) and supports horizontal luminance resolution up to 18MHz. This is a 525 sequence scanning signal.

(Line doubling processing sets the effective line period to 2 and changes the sampling frequency and video (double both widths).

The process described is shown in Figures 1O and 11 for the encoder and decoder of the device. A multiplexed analog component signal transmission system explained in conjunction with the block schematic diagram in Fig. This would provide a very cost-effective means of

The transmitting device according to FIG. 10 executes the transmitting step of the above-described process.

Step 1: 28MHz orthogonal sample after passing through an 8.7M) lz pre-filter Perform the

Step 2: Perform digital diagonal filtering.

Step 3: Delete every other sample of 28MHz to 14M) Iz.

Step 4: Perform digital to analog conversion and diagonally symmetrical transmission filtering .

It looks like the diagonal filter has to be realized with a sample rate of 28MHz. However, this is simplified by the fact that the sample is discarded in step 3.

Figure 1O shows that the main elements of the digital filter are realized at a sampling rate of 14MHz. This shows the configuration that will be used.

A diagonal filter is realized as two separable (horizontal and vertical) filters. It will be done. The vertical filter can be very simple, i.e. the line store 101 and the adder. The horizontal filter 103 provided with 102 has a rejection of about 40 dB in the stop band. Achieve.

To achieve such rejection, a horizontal filter 103 (5MHz low-pass ) uses 16 coefficients at 28MHz. The design of the horizontal filter 103 is 9 It is a symmetric non-recursive filter that is optimized using bit coefficient values. Response and coefficients is shown in FIG.

According to FIG. 10, switch 100 has a pre-filtered 28 MHz signal. Every other sample of the sampling signal is switched to two 14M) lz paths.

According to the upper path, the samples are vertically filtered and horizontally filtered. Ru. The lower path is subtracted from the upper path in adder 102, and the upper path is added to the lower path in adder 104. At the output section of filter 103 , a low-pass comb characteristic with zero energy at zero frequency is shown, and the adder 10 The output section of 4 has a low frequency comb characteristic (actual (line) and high-frequency aliased characteristics (dotted line) above 5MHz are shown. Ru. The result of the output of adder 105 is the horizontal resolution folded into the range of 5 to 7 MHz. This is the transmitted signal. One sample is shown for each al, bl sample pair. 5 fish samples on every other line separated by 14MHz like remains from the group. As a result, 28MHz processing is possible by deleting every other sample. is achieved at 14MHz.

Figure 11 shows a decoder that can also implement a digital filter at 14MHz. It shows da. In this case, the 5MHz low-pass filter 11 includes 8 coefficients. The characteristic response and coefficient data are shown in FIG.

According to Figure 11, a 14 MHz input signal sampled according to The receiver decoder further includes an upper path adder 11 2 and a line store 113, the lower path further includes a single element delay an interpolation circuit 114 that includes the The upper and lower paths, including the equalization (divide by 2) circuit, are switchable at 28MHz. are converted and added by an adder 115.

Figure 14 shows the well-known high-definition 1125 developed by the Japan Broadcasting Corporation (NHK). Compared to the line MUSE system, the idealized The two-dimensional frequency response is shown. The MUSE system has multiple storage and thus includes a scan converter including one field store. It is significantly more expensive to implement than the present invention. Still, dynamic or stationary For images, the horizontal resolution is equal to or brighter than the SE system according to the invention. It is significantly superior in vertical sharpness, and in scan conversion it is almost comparable in vertical sharpness. be.

Figure 15 shows the actual response achieved using the filter that has been described. Ru. According to Fig. 15a, the position of the folded energy (shaded area) is also -dimensional It is shown in In Figure 15a or 15b, A is the diagonal of the encoder. B is related to the prefilter and C is related to the diagonally symmetric filter. ing.

The diagonally symmetric transmit filter is implemented in the form of a narrow log according to the method described above. Up The device described above produces a symmetrical non-recursive filter that generates an ideal linear phase characteristic. routers are used alternately. If the digital filter produces a diagonally symmetrical response, When used for The required digital filter has zeros in all alternating coefficients except for the middle term. This leads to execution at 14MHz (one execution at 28MHz). Not needed when every other sample is automatically dropped with a coefficient of every other 0 , the middle term is treated separately. ) Figure 15 shows the use of a non-recursive filter with 16 coefficients. It shows.

FIG. 16 shows the actual two-dimensional response achieved by the system. No. In comparison with Fig. 14, Fig. 16 shows 945 (950) lines at the expense of diagonal information. It shows improved horizontal resolution across the entire range. According to the embodiments and methods described above , the horizontal resolution of luminance has been improved, as well as the vertical resolution of scan conversion. The present invention improves the U/V clock on every other transmitted line. Improved chrominance horizontal solution with 3:1 compression of chrominance data It will provide an image. Scan conversion improves the vertical resolution of chrominance. It is designed to However, in B-MMC, chrominance is intentionally No improvement in resolution is required.

Figures 10 and 11 show detailed schematic diagrams of the high-quality B-MMC transmitter and receiver. I have explained this with reference to Figure 17, but the processing of brightness and chrominance is further explained in Figure 17. This will be explained with reference to FIG.

Referring to Figure 17, in cooperation with the chrominance processing circuit at the encoder position, A block diagram of the circuit for brightness processing at the same encoder position is shown. Ru. According to FIGS. 17 and 18, the separate processing paths are connected to the same diagonally symmetric filter section. Video brightness that exceeds 1710 or jumps 2:1 on 1125 lines The signal is provided to a vertical filter/interpolator circuit 1701 and 480 according to the present invention. The book will provide static vertical resolution of the line. As already explained, one The other lines are deleted by a decimator 1702 and the result is It provides a signal of 525 lines skipped by 2=1 and also has a diagonal filter. data 1703. 28MI of the diagonal filter (sampling output of z is , then delete (decim) which deletes every other sample on every other line. ation) circuit 1704 to obtain a five-point sample at a sampling rate of 14 MHz. Leaving the sample configuration, the resulting sample is stored in memory and time pressure Perform 3:2 sample compression in the time domain in compression circuit 1705 The zero time compressed samples read at different rates are then added to adder 1706. The signal is then mixed with the chrominance and data/audio signals for transmission. diagonal The symmetrical filter section 1710 is configured to combine the processed luminance and chrominance signals. is possessed.

Referring to Figure 18, chrominance processing is similar to luminance processing, but with U/V component. The minute signal is transmitted every other line, and the chrominance is transmitted every other line. It is normally compressed at a ratio of 3:1 according to the B-MMC transmission format. as a result, Same in either interlaced or uninterlaced format as luminance signal The number line chrominance input is a dynamic input of 120 lines at the image height. or vertical filter to achieve static chrominance resolution of 180 lines. /interpolator 1801. In the horizontal dimension, the achieved chrominance solution The image resolution reaches up to 300 lines of image width. Since every other line is processed , U, and ■ line deletion circuit 1802 is operated at a rate of 11. La The output of the in-removal circuit is fed to a horizontal filter 1803 centered at 2.5MHz. It will be done. The high frequency color sample output from the horizontal filter is passed through time compression circuit 1. time compressed to 3=1 according to the B-MAC transmission standard in The numbers are mixed for transmission. That is, the U and V components are signal and transmitted line by line as in standard B-MMC.

Audio or data channels are also input to multiplexer 1706. 1st 8, the same diagonally symmetric filter section 1710 is coupled prior to transmission. added to the received signal.

Now, referring to Fig. 19, a high-quality BJ consisting of image information of luminance and chrominance is shown. An example of the processing of the IAC signal is shown.According to the present invention, the 10.7MHz Compli-sentary diagonally symmetrical filter section 1901 is HMB - Receive the MAC signal. As a result, aliasing of the composite signal is eliminated.

The output of the diagonally symmetrical filter section 1901 is sampled at a rate of 21 MHz and is degree path and chrominance path. The result is a figure 5 or 5 dot shape. This is a sample configuration. The luminance samples are time-expanded 3:2 by a time expansion circuit 1902. lengthened. The output is the replacement and missing every other sample on every other line. A diagonal filter/interpolator stage 1903 provides a pull to the digital output.

According to the chrominance path, the chrominance samples are Samples time-stretched by 3:1 and time-stretched at 7 MHz can be used. Vertical filter/interpolator to provide a capable R-Y and B-Y chrominance output. Granted in 1905. These are modulated by a modulator 1906 to provide luminance and chrominance. shared digital-to-analog converter 19 to provide outputs Y and C of the 07 or separately output to a high definition television receiver.

A high definition television receiver is shown in the form of a block diagram according to FIG. .

Luminance sample 4 output from the decoder of FIG. It is input to a high-definition receiver along with the power. According to the block diagram, field storage 2 01, combination of Morsilan detector 2003 and interpolation algorithm logic device 2004 A scan converter 22001 is provided. The intention is to The point is to quickly perform line doubling in the vertical dimension. Scan converter in 1988 As disclosed in Application No. 255.238 filed October 11th used and incorporated herein.

Different luminances as a result of an interpolation process that requires field storage and associated delays. The signal path includes a delay and compression circuit 2005.2006 for 2:1 compression; 1 compression is passed through the compression circuit 2007 to the scan converter output and multiplexer 2008. mixed and displayed.

The chrominance information is interpolated in the vertical dimension by a vertical interpolator 2010 and compressed by a compression circuit 2o. 11 and compressed 4:1 in multiplexer 2012 for display. mixed with the nonce input signal.

Referring to FIG. 21, the overall end user location is shown. High quality B- The M^C signal 2101 is received and sent to a video cassette recorder output section 2102 or is a high-definition television with 0 images displayed alternately on the input section 2103 of the landline cable. The digital receiver is responsive to user selection inputs entered via selector 2104. and, for example, in the scan converter 2105, the line doubling It uses a scan conversion method to display high-quality 16:9 aspect ratio video. Furthermore, The off-the-air broadcast television signal 2108 is received by Tena, tuned by Chena 2109, and NTSC deco if necessary the same scan converter 210 for display. 5 and then output. If the broadcast signal 2108 is of high quality, the terrestrial high-definition signal is Coder 2111 is required. As a result, having a high-definition television receiver The user can encode the received signal in high or low resolution multiple analog component format. coded, high definition, and standard NTSC low resolution. However, the resolution of the displayed video can be improved.

pure) (no change in inherence) Engraving (no changes to the content) Engraving (changed to internal L) FIG. 8b (No change in purity content) FIG. 10 1. Responsibility (no change in nature) FIG, 15b FIG. 16 (response Procedural amendment (formality) March 0, 1992 [Japanese

Claims (10)

[Claims] 1. TV brightness composition by removing predetermined samples for transmission. luminance processing means for processing the minute signal; Television chrominance by removing a given sample for transmission chrominance processing means for processing the luminance component signals and the processed luminance for transmission; multiplexing means for combining the component signal and the chrominance component signal; said multiplexing means for filtering said multiplexed signal for transmission; and a diagonally symmetrical filter section responsive to and coupled to the preferential filter section. Encodes high-quality multiplexed analog component television signals for transmission featuring device to do. 2. The brightness processing means includes: Vertical filter interpolator for filtering the incoming video signal and every other a line deletion circuit responsive to said vertical filter interpolation circuit to delete lines of and, a diagonal responsive to said line deletion circuit to provide a quincunx video sample configuration; line filter, responsive to said diagonal filter to compress the video signal samples for transmission; A time compression circuit for encoding a high-definition television signal according to claim 1. device to do. 3. The chrominasis treatment means includes: A vertical filter interpolation circuit for filtering the incoming video signal, and U and V. to the vertical filter interpolator in order to remove the ends of the components in every other line. A responsive line deletion circuit and a line removal circuit to filter the color at the center frequency a horizontal filter responsive to the in-removal circuit; The horizontal frame is used to compress high frequency color samples by a ratio of 3:1 for transmission. and a time compression circuit responsive to a filter. A device that encodes a John signal. 4. TV brightness composition by removing predetermined samples for transmission. luminance processing means for processing the minute signal; Television chrominance by removing a given sample for transmission chrominance processing means for processing the spectral component signals and high-definition multiplexing for transmission. In order to filter the transmitted analog component signal, the luminance processing means and the chrominance processing means and coupled to the preferred diagonal symmetrical filter section. High quality multiplexed analog component television for transmission with symmetrical filter section A device that encodes a signal. 5. A given television signal sample is removed prior to transmission, and upon reception In a device that decodes a high-quality multiplexed analog component television signal, connected to a preferential diagonally symmetrical filter section to filter the received television signal. A diagonally symmetrical filter section connected to the filter and sampling the filtered signal. sampling means responsive to the diagonally symmetrical filter section to By interpolating the removed luminance samples, we convert the sampled signal to a brightness processing means for processing; By interpolating the missing luminance samples, we convert the sampled signal to Chrominance processing means and equipment for processing. 6. The brightness processing means includes: a time stretching circuit; and a diagonal filter and an interpolator to recover the removed luminance samples. The apparatus according to claim 5. 7. The chrominance processing means includes: a time stretching circuit; Vertical filter and interpolator to recover deleted chrominance samples and 6. The device according to claim 5, comprising: 8. Compensate the luminance samples determined from the motion between the first and second fields. A luminance processing path that includes a motion detection/interpolation circuit for interpolation, and a chrominance ・Equipped with a chrominance processing path including a vertical interpolation circuit for interpolating samples. to process the luminance component signal and chrominance component signal for display. An apparatus coupled to a high quality multiplex transmit analog component television signal decoder. 9. The motion detection/interpolation circuit includes a field for storing the first field. a field store and a sample from said stored field and a second field; an interpolator responsive to the motion detector to interpolate the pull. The processing device according to scope item 8. 10. Furthermore, the delayed luminance input signal and the output of the motion detection/interpolation circuit are combined. first and second compression circuits for respectively compressing the and a multiplexer for multiplexing outputs. Device.