CN101005577B

CN101005577B - Receiver device

Info

Publication number: CN101005577B
Application number: CN200610111095XA
Authority: CN
Inventors: H·布拉特尔
Original assignee: Thomson Consumer Electronics Inc
Current assignee: Technicolor USA Inc
Priority date: 1995-09-15
Filing date: 1996-09-13
Publication date: 2012-10-10
Anticipated expiration: 2016-09-13
Also published as: CN100515063C; CN101005577A; CN1917615B; CN100429932C; CN1870731A; CN1917615A; CN1870735A

Abstract

In a consumer digital recorder replayer, disappearance of MPEG process can prevent information displaying on condition screen of recorder. Kinds of disclosed methods can simplify display condition information of recorder replayer. A first embodiment returns resetting decode analog video signal 102 to a digital recorder replayer 200 to insert condition of information. In a further embodiment, information data 221 of the recorder are coupled to digital signal decoder 100, 117, 520 to be included in decode analog video signal 102. In another embodiment, information dictation of recorder TAG/CMD coupled to decoder 100, 510 to store special image information of recorder. In other embodiment, information data 221 of the recorder are marked and coupled to decoder 100, 510 to select special image information of recorder, if can be obtained, or displaying information data of the recorder 200. In other embodiment, digit or analog work method certain display location and fixed time of recorder information. In other embodiment, interlink and control method of simple screen is disclosed, simplifying analog and digital videocorder signal screen via automatic input signal part 311.

Description

Receiver apparatus

Application of the present invention is to be that September 13, application number in 1996 are that of 96197954.2 patent application of the same name divides an application the applying date.

Technical field

The present invention is relevant with the field of digital video record, especially with the various device part between connection relevant.

Background technology

Digital video signal can be processed, and has the bit stream that bit rate reduces so that form.According to the MPEG compression method, can realize the processing of this minimizing bit rate, and can format, for example, but with the compatible structure of a kind of MPEG, such as the sort of structure that in digital satellite system, is adopted, for example DSS ^TMMajor Leagues of perhaps being advised or GA terrestrial broadcast system.

Consumer's video tape recorder can be used to provide the registering capacity of analog signal and digitally encoded signal, and this digital signal is for example compatible with mpeg standard, and has GA or DSS ^TMSignal format.The consumer's video tape recorder that is adopted can be thought two electronic systems within a box, shared video recording mechanism, servo system, and control system.In the place of analog luminance signal composition frequency modulation(FM) RF carrier frequency while analog chrominance signal composition Modulation and Amplitude Modulation the 2nd RF carrier frequency, can use the conventional simulation recording method.When being reproduced, two signals of being modulated are by demodulation, in conjunction with and be connected to video display.

In record and replay operations mode, displaying information on screen can show the operating state of video tape recorder, alert consitions, and during the tape, writing time, timing code or the like.Information displayed on screen or OSD can be increased to analog video output signal so that to the user video tape recorder state information is provided.

Through utilizing consumer's video tape recorder, can accomplish digital record as a kind of digital code stream register/reproducer.With the bit stream of mpeg compatible, for example transmission package can write down and playback to simplify through transmission package is formatd again by record.For example, transmission package can be buffered with error-detecting and to the digital word that institute calculates and increases and proofread and correct.Code stream with error-detecting can be formatd, to become recording data blocks or to be included in the synchronization blocks of the predetermined bite in each recording track.The synchronization blocks signal can be encoded so that the signal that is more suitable in digital record is provided, and for example, removes any direct current part, and perhaps the signal to record carries out frequency spectrum shaping, and such modulation can produce through the coding of " code book " type.In manner of playback, recording process is reversed effectively, and for example, " code book " encodes decoded, detects and correction error, and removes the synchronization blocks format, becomes the form of original MPEG and so on to recover bit stream.

In order to reduce the fringe cost increment of digital record and regeneration to greatest extent, in video tape recorder, do not comprise mpeg decode and coding.Like this, video tape recorder must be handled the bag stream of MPEG and so on, and does not change or increase.Therefore, video tape recorder provides program to postpone or the time migration setting.Yet, during simulated operation, increase to video tape recorder state and the alarm and the demonstration of tape timer etc. of analog output signal, during the mode of digit manipulation, can not exist.Therefore, through observing the video tape recorder control panel, only can understand the video tape recorder state.

Through using BDB Bi-directional Data Bus, can simplify derived digital signal, system interconnection between video tape recorder and the monitor display and control.Being added to any interconnection on the analogue system brings elusive complexity and confusion installing can for the user.No matter the operating state of video tape recorder how, a kind of simple interconnection of connection need be provided between derived digital signal and display all.Through identical interconnection system, this simple interconnecting method must be simplified the work of analog-and digital-video tape recorder.In addition, video tape recorder state and warning message need show to the user in analog-and digital-video tape recorder working method.

Summary of the invention

The simple interconnection method of simplifying analog-and digital-register work is provided by following creative device primely.The vision signal display comprises and is used to handle the device of wanting video signal displayed.Input unit receives between two vision signals and selects, to be coupled to processing unit.First input end receives component video signal, the second input composite video signal.Control device is connected to and receives and choice device, and control device has the first predetermined state, has wherein selected first input end, and in response to second state of external control signal, has wherein selected second input.External control signal is transmitted by component video signal.

Description of drawings

Fig. 1 is the block diagram that includes the signal source that is coupled to decoding and display.

Fig. 2 has shown the example block diagram that comprises various creative embodiment.

Fig. 3 has shown the example block diagram of the simplification switch that comprises various creative embodiment.

Embodiment

Fig. 1 illustrates consumer's DAB video system of simplification.The signal source of packing, the audio frequency and video of compression is shown as with decoder with control data and is connected with display.Receiver IRD100 is connected with reception antenna 50, and the signal of modulation also can be provided from the cable distribution network (not shown).The packetized signals of this modulation is by tuning, demodulation, and also the program that the user confirms is separated in the piece that is designated as bag source 109.The output in bag source 109 comprises by the transmission package of the audio frequency and video of mpeg decode and control data stream, to produce the Voice & Video signal by decoder 117.The output of decoder 117 is connected to the display 300 that is used to keep watch on.Other packetized signals source with dashed lines is shown as the alternative data flow of being carried out mpeg decode by decoder 117.Therefore decoder 117 can be used to reduce the cost in other source thus to decoding from the MPTS in external packets source.For example, the computer of packing output signal can be represented to form in bag source 75.Sort signal can be from computer storage, to extract or produce such as computer network from external source.This computer sources can be from the audio frequency and video and the control data of magnetic disc store regeneration compression.In addition, digital video display can be represented in bag source 75, such as the DVD checker-work.By the magnetic tape reproducing register another transmission package source can be provided, bag source 200, it can have such as with D-VHS or the corresponding form of DVC standard.

Consumer's digital video receiver of simplifying, register and display system are illustrated in the example block diagram of Fig. 2.This system adopts digital video signal source, for example integrated receiver decoder or IRD100, and audio frequency and video monitor display device 300 and digital video tape recorder 200, this digital video tape recorder 200 for example adopts D-VHS or DVC form.In illustrated system, the digital video representation signal is modulated on the RF carrier wave and by antenna 50 and receives.Antenna 50 is connected with integrated receiver decoder IRD100., the carrier wave of modulation also can be provided to receiver 100 by the cable distribution system (not shown).This integrated receiver decoder 100 by be tuned to the RF carrier frequency and the transmitting data stream of decoding and mpeg compatible thus.

This transmitting data stream can be decoded, to produce analogue audio frequency and vision signal, to be kept watch on by audio frequency and video display 300 immediately.The output signal of this decoding is by being connected receiver, signal 101 between IRD100 and the

display

300 and 104 expressions.Consideration designation number register 200 to cost also can not comprise mpeg encoded and decoding.Therefore digital recorder 200 plays the function of bit stream register/reproducer, postpones ability so that time migration or program to be provided.The omission that MPEG handles and can not be to come and go for simplifying that the required complicacy of non-standard rate play capability makes with degree, the playback in slow motion or the track manner of playback is visual.Therefore, generally speaking, receiver 100 will be connected to digital A/V bus 112 with the bag of mpeg compatible stream, with by register 200 records.Similarly, come the playback bag stream of self-recorder 200 to send back to receiver, so that mpeg decode produces audio frequency and video.The status message that in register, omits additional consequence that MPEG handles and be display message on the screen or OSD form can not make up or be added in the pack bitstream of playback.Therefore, the operating state of register can not offer the user significantly.

In addition; Because just at record, resetting and stopping mode obtaining the register pictorial data, then the user does not know what the response of register after control command be. for example change to the rewinding meeting and cause that the image of resetting is such as switching to incoming bit stream from playback; This is known electronics to electronics or E to the E state; Perhaps, the image of for example resetting can disappear and replaced by the freeze frame that IRD produces, and perhaps motion video is mixed captions by color field.Therefore, as the sign of recording mode response, the user is not sure of and knows these visual display effects.

System shown in Figure 2 has shown first creative jockey, and wherein the bit stream of decoding is connected to register 200 from receiver IRD100 through BDB Bi-directional Data Bus 112.This transmission package stream is connected to data/address bus through interface 110 and receives at register 200 places by means of receiving 210.This interface is Be Controlled through control data stream, and this data flow is to carry on the separated wires in data/address bus 112.Control signal can be extracted through start-up control switch (not shown) from user input, or the IR remote control command that is produced by the user produces.For example, the user can select to keep watch on the DAB vision signal that is received by antenna 50.Can select this receiver through touch or remote control.The selection of receiver can cause keeping watch on automatically this demonstration to be selected, i.e. this demonstration is automatically switched to the audio frequency and video output of keeping watch on mpeg decode.This user can select digital recording mode, and it can make through bus 112 and be coupled to register and opening entry from the MPTS that IRD receives.Similarly, select the manner of playback of digital recorder can make the data flow of playback be coupled to the decoder 117 of receiver 100, so that decode through bus 112.

Be coupled to register 200 with the packetized signals of mpeg compatible and be processed, so that by piece D.REC210 record.A buffer memory is included among the piece D.REC210, and data are flow to row buffering, to set up the signal that is more suitable for writing down than the packetized signals that comprises the data pulse with variable interval.Buffered data streams is read from buffer, to form record format synchronization blocks, its available error-detecting correction data word code.The formative data flow of this synchronization blocks can be modulated, so that kind is by record as stated, and is coupled through selector switch A4 from record block D.REC210.D-VCR working method according to selecting is controlled selector switch A4 and A5.For example, shown that in Fig. 2 switch A4 and A5 have digital record contact DR and digital replaying contact DP, be used for data flow is coupled to rotary head device 250 or output stream therefrom.For analog operation, switch A4 and A5 adopt another position, AP, analog record and AP emulated for playback.Be coupled to from the formative data flow of the synchronization blocks of D.REC210 and place magnetic head assembly 250, so as on tape record.

In manner of playback, the formative data flow of the synchronization blocks of record is reproduced from tape by the transducing head 251 that is positioned on the device 250.The signal that is recovered is by digital replaying piece D.REP220 demodulation, to remove any record channel modulation.By means of the data word of inserting before the record signal of resetting is carried out error-detecting and correction then.After error correction, the synchronization blocks format is removed, and the bit stream that is recovered has identical with the packet format that is coupled to register basically packet format.Bag stream from piece D.REP220 is coupled to interface 210, and it should wrap stream in response to the manner of playback of register and be coupled to BDB Bi-directional Data Bus 112, so that by decoder 117 decodings.

100 pairs of bag streams with mpeg compatible of integrated receiver decoder are decoded and are produced video/audio output signal.For example, Fig. 2 illustrates video and

audio output signal

101 and 102 and component video signal 104, for example S-Video., the vision signal of this digital replaying does not have usually by shielding the recording status information that upward demonstration or OSD device provide.

The receiver IRD100 that in Fig. 2, shows with reduced form comprises controller CTRL115, and it provides the The whole control of receiver, and is for example tuning, unwraps head control along separate routes, and EBI is controlled and is coupled to the bag stream of mpeg decoder 117 and selects.In addition, can indicate the state or the working method of receiver by means of display message on the screen on the vision signal that is added to decoding.Controller 115 can be constructed on the screen display message or read predetermined stored message from memory block MEM510.This screen is gone up display message or OSD is coupled to OSD inserter or adder, piece 520, wherein, this message is formatd so that the mould video shows, and be added to or with the vision signal combination of mpeg decode.This video with osd signal is through output amplifier 118 outputs, so that shown by monitor display 300.

Record reproducing device 200 comprises on-screen display generator in Fig. 2, OSD.GEN270, and it is connected with control system CTRL205.In response to the signal from register controlled system 205, osd generator 270 produces state or the warning message that is suitable for condition of work.This message is formatted as vision signal, in piece OSD.ADD275, to be inserted into or to be included in the analog video signal.Analog video signal is coupled to screen from video selector piece SEL.280 and shows adder 275.

Selector 280 is by control system 205 controls and be provided at the selective power between the various simulation signal generators.For example, the signal that switch A1 provides at tuner provides analog input signal to select between the audio frequency and video output signal 102 of base-band analog signal input and mpeg decode.The output of switch A1 is connected to piece A.REC, so that record.

The selector switch A3 of SEL280 can provide primely and be coupled to the signal selection that screen is gone up demonstration adder 275.Provide the connection of create giving birth at the switch A3 shown in Fig. 2, the video composition of output signal output 102 is coupled to screen goes up the input that shows adder 275.The status message of the register reproducer 200 that therefore, for example in playback, produces can be added to from the vision signal composition 102 of output transmission package stream decoding.So, can see by display 300 being added with the upward replay signal of the mpeg decode of the digital form generation of message of screen, signal 103.

During the analog operation of register reproducer, switch A3 goes up emulated for playback signal VHS and shows adder 275. therefore to screen, and during analog operation, OSD message is added in the emulated for playback vision signal.When selecting digital record, OSD message can advantageously be added to from the analog video signal 102 of the bit stream decoding reset.Therefore, connect through favourable feedback, recorder status message and video composition make up and export as analog signal 103.

The switch A2 of selector SEL.280 advantageously provides the bypass screen and goes up the connection that shows adder 275, and allows output signal 102 to be directly coupled to monitor display 300.Because of the bypass action than switch A2 allows to watch the output signal of decoding and gets rid of the possibility that reduces owing to 275 pairs of signals of adder.When the standby mode register is closed, maybe when watching non-record " in real time " bit stream of decoding, can automatically select bypass path A2.In order during analog record, to allow to watch the non-tracer signal of decoding, can manually operate this by-pass switch.For example through E/E register passage, this favourable bypass connects has got rid of unnecessary analog recorder signal processing, and itself can damage the signal 102 that digitlization produces.In addition, this favourable bypass functionality can for example be simplified by Mechanical Contact, allows receiver IRD100 to be connected to monitor display 300 such as switch A2, and no matter the operating state of register 200.

On-screen display generator 270 produces with specified level and vertical synchronization timing formatted message, and feasible when this message is inserted into vision signal, it is displayed on the precalculated position of display screen., when working in the digital replaying mode and adopt this above-mentioned favourable feedback to connect, the vertical synchronization different with the analog recorder duration of work capable of using regularly advantageously produces OSD message.This different horizontal and vertical synchronization have regularly advantageously compensated the inhibit signal of in receiver 100, running into and have propagated and the mpeg decode delay issue.Therefore use different OSD synchronization timings advantageously in the work of analog or digital register, to obtain identical predetermined message position basically.

The time delay of processing and mpeg decode can be accumulated as the period of multiframe.Multiframe postpones or the time migration meeting causes OSD message prior to the visible incident of the playback of reality.The time migration meeting such prior to replay event of register OSD message is rendered as the result of user's control command and the delay of corresponding playback image effect occurs.When displayed record time code signal or register tape timer, this time migration meeting causes bigger problem.For example, during magnetic tape reproducing, from the screen of register tape timer show or writing time coded signal OSD can see special event.The time of being seen allows the position successively of selected incident., if the in-edit of the time of the being seen electronic editing that is applied between register, to carry out, the scene of edited result will be located between preview period before the selected scene.Through delay, message produces, message communicating, and tape timer time yardage or counter are revised in appearing or passing through of OSD, and the time migration effect between this message and playback image can advantageously be suppressed.In register 200, can be the delay of DLY.207 by switch A7 or A8 selected marker.For example, when the vision signal 102 of decoding is had the register OSD message of inserting at piece 275 places by feedback,, can produce the instruction of OSD message in response to controller 205.Come the message command signal CMD of self-controller 205 to be illustrated as and be coupled to switch A7 and delay line DLY207.In response to being register 200 selected modes, promptly analog or digital comes control switch A7.Switch A7 is displayed on digital form, and selects the delay version from the signal CMD of delay line 207.This delay instruction signal can cause the generation and the insertion of OSD message, and it overlaps with the vision signal of decoding basically.The device of a replacement has adopted switch A8, and it can be inserted into delay line 207 in the output of osd generator 270.In this device, switch A7 is connected to the output of controller 205.Switch A8 also can be used for signal CMD is postponed to be coupled to bus 112 and IRD100.In the access signal through retardation ratio such as DLY.116 being incorporated into memory or the output signal of memory, the also time migration between the delay image of recoverable OSD message and decoding in receiver 100.Utilize the whole bag of tricks, for example by means of the delay of using clock data to latch, shift register, one-shot multivibrator or the like can obtain the synchronous of image and OSD of resetting.For example during carrying out the edit mode of preview by the algorithm process that shows number, tape timer or timing code OSD can be synchronous with the image of decoding.Therefore the image that can import selection is digital with identical demonstration, so that accomplish electronic editing.During the analog operation of register 200, come the command signal CMD of self-controller 205 not postpone, and switch A7 is directly coupled to generator 270.

In another creative embodiment, display message can advantageously utilize display capabilities on the screen of receiver 100 on the screen that is produced by register 200.The message that register provides can be coupled to receiver 100 through the pilot of data/address bus 112, inserts so that shield demonstration at the piece OSD520 place of Fig. 2.This register message data can be formatted as word message by generator 270, and attaching above that has a mark or label.The word message of mark that is shown as signal 271 is coupled to the controller 115 of IRD100, from other control bus data, to separate.The word message that separate the back is coupled, and inserts with video so that carry out display formatization by OSD520.Produce word message in response to the OSD command signal CMD that comes self-controller 205.As stated, at piece 207 places, signal CMD can be postponed., the word message from piece 270 can be postponed in the delay 207 of another point owing to switch A7 insertion.

In another creative embodiment, receiver 100 comprises memory 510, and it comprises receiver screen and goes up the specific OSD message of display message and register 200.Go up the special message that idsplay order signal CMD can the access record device in response to register screen, the last idsplay order signal of this screen can be coupled to controller 115 through control bus.In register 200, produce screen by controller 205 and go up idsplay order signal CMD, the also definite in addition message that will produce of controller.Therefore, command signal CMD can advantageously be coupled to 100 pairs of receivers and be stored in the format that the special graphical messages of register in the memory 510 is carried out access and demonstration.

In the receiver 100 of another creative structure, between register word message or receiver graphical messages, select in response to register instruction adaptability ground.Selection between register literal or IRD graphical messages show allows to have the interconnection of different qualities and the register of setting and various years and receiver.For example, an old receiver can be connected to the register of making recently, and therefore, this receiver memory does not comprise the graphical messages of pre-programmed, comes record support device screen to go up appearing of display message.Therefore this receiver can show the simple text message that is produced by register.On the contrary, the graphical messages of the various products that more modern receiver can be through selecting the various manufacturing age carried out pre-programmed, and these various graphical messages can replace the register word message and are shown.Through appending to sign or the label in the word message, can be reduced at the selection between simple text or the graphical messages.For example, this sign or label can comprise command signal CMD, and it selects and start the special message of needed register.In addition, this label can provide enough capacity, with the characteristic information of announcement recordings device, and the producer of those and register for example, model, version or version height and the relevant information of sequence number.When controller 115 received this literal message with sign or label, this sign or label are turned over to be selected, and caused from IRD memory 510, selecting a register special pattern message., if receiver memory special register message of no use or carry out pre-programmed for the specific message of register characteristic then should start format and show additional simple text message by sign.As stated, can insert a delay cell and compensate OSD message, the decoding of literal or figure and playback is the displacement in the time between the decoded picture and space.

Fig. 2 illustrates a monitor display, and it has three input end of analog signal:

AV signal

101 and 103, audio frequency and component audio signal 104 (for example S-video), or brightness and chrominance component Y, Pr, Pb.In addition, through radiofrequency signal RF IN, display 300 can receive the Voice & Video signal.A known signal selector 310 is coupled to video and synchronous processing circuit (not shown), and it produces image and shows in combination.Start the switch on the display 300 through the user, perhaps start remote control command, with regard to may command signal selector 310 through the emission of modulation IR control flows by the user.Through the automatic control of selector switch 31, can advantageously select illustrated these three base-band input signals.For example, just can automatically select to comprise the input signal of register OSD state display message to the selection of digital record or manner of playback.This recorder status OSD can be produced as described above.In addition, the permission of many baseband signal inputs can allow the interconnection of the special device of function.For example, through using such as output signal 101, or component video signal 103,, just the signal of non-record can be decoded from IRD100 direct viewing easily to form A/V signal 103 with being used for the output signal 102 that register OSD inserts.

Fig. 3 illustrates the for example operating position of display 301 of display that cost reduced.In order to reduce cost, the quantity of signal input part can be restricted to a for example radio frequency (RF) input, and one-component video or S-video inputs and an audio frequency are looked tired signal input part.Input selector 311 is connected to signal processing apparatus 314, and is well-known, and it produces required video and synchronizing signal, to simplify video display.This outstanding selection of the selector 280 of Fig. 2 and bypass capability allow display 301 to bring in monitor log and material non-record through single A/V input., this demonstration can advantageously utilize component video signal to connect, and outside connecting at signal, definite and control demonstration input is selected.For example, owing to can suppose that component video signal or S-VIDEO signal provide than the better displayed image quality of NTSC code signal, this component signal that is coupled to the component signal input can automatically cause the selection in component signal source.Therefore, when component and component signal were coupled to display 301 inputs 1 and 2 respectively, input controller had such logic, and its predetermined component signal of selecting is imported as a reference., this is imported selection automatically and can stop and keep watch on the signal comprise the special information displayed on screen of register that comes from register 200 couplings of Fig. 2., this is selected to be advantageously used in the remote control that starts AV signal with reference to input automatically and selects, for example the signal 103 on the input 2.Through allowing or interrupt output coupled signal 104, and component signal 104 is carried out creative control, can on display 301, watch the signal that comprises information displayed on screen through register 200 couplings from IRD100.For example, the signal that the user selects non-record bit stream promptly to receive will cause the controller 115 of receiver 100 to begin to produce or export to have the for example component signal 104 of S-VIDEO form.Selection to the recording picture signal that is used to show will cause controller 115 interruption generating or output component signal 104.Therefore; The controller 312 of monitor 301 is connected to the component signal input; To come the disappearance of detection signal 104 through signal 309; And making input selector 311 switch to the AV signal 103 on the input 2 for example from the component input signal 104 on the input 1, input 2 is connected to the selector 280 of the register 200 among Fig. 2.

Claims

1. a receiver apparatus (100) is used to be connected to image karaoke device, and to receive the decode the digital video signal of compression, said receiver apparatus comprises:

Be used for receiving the digital video signal (221) of compression and the device (110) of mode status data marking signal (271) from said image karaoke device, said mode status data marking signal is indicated the working method of said image karaoke device;

Decoding device (117) is coupled to said be used to the receive digital video signal (221) of compression and the device (110) of mode status data marking signal (271), and the digital video signal of the said compression that is used to decode also produces vision signal;

Control device (115); Be coupled and receive said mode status data marking signal; Be used to detect the content of said mode status data marking signal (271); And based on the content of the said mode status data marking signal that detects; Be controlled at the combination of display graphics message data signal and the vision signal of said decoding on the screen of pre-programmed in the memory (510) in the said receiver apparatus (100), and transmit the output that said composite signal arrives said receiver apparatus, wherein; Said content comprises instruction; It makes said control device (115) recover display graphics message data signal on the said screen and with the vision signal combination of display graphics message data signal and said decoding on the said screen from said memory (510), and if on the said screen display graphics message data signal be not pre-programmed in the said memory (510), then do not make up from the vision signal of display graphics message data signal and said decoding on the screen of said memory (510).

2. according to the described receiver apparatus of claim 1 (100), also comprise the deferred mount (116) that is connected to said control device (115), be used to postpone the combination of the digital video signal of display graphics message data signal and said decoding on the said screen.

3. according to the described receiver apparatus of claim 2 (100), wherein said deferred mount provides the delay of the decode time that equals said decoding device, makes on the said screen digital video signal of display graphics message data signal and said decoding synchronous thus.

4. according to the described receiver apparatus of claim 1 (100); The digital video signal of wherein said compression comprises a plurality of frames, and said control device is combined with one of decoded video frames from a plurality of frames of the digital video signal of said compression with display graphics message data signal on the said screen.