CN1722812A - By comprising synchronously and the equipment of the network transmission/reception information of asynchronous paths - Google Patents

Abstract

A kind of Apparatus for () and method therefor by network transmission information comprises first device, has a transformat transducer, is used for receiving user interface data; User interface, be used for order and control first the device, be the transformat that is used to transmit with information translation; Second device has display unit, is used for showing the user interface that is used for order and control first device; And physical layer, be used for connecting first and second devices so that communication.IEEE 1394 interfaces are used as physical layer, thereby second device can be controlled the work as the playing device of first device, and the interface that uses MPEG-2 to transmit between the device that flows becomes more easy.

Description

By comprising synchronously and the equipment of the network transmission/reception information of asynchronous paths

The application is that application number is 03101496.8, the applying date is on June 19th, 1999, denomination of invention is divided an application for " by comprising synchronously and the equipment of the network transmission/reception information of asynchronous paths ".

Technical field

The present invention relates to the transmission of numerical data, in more detail, the present invention relates to be used for will being sent to from the information of digital universal disc (DVD) by network the equipment and the method for a device that can be user-interface display, this apparatus and method allow this display unit to go to control this DVD information.

Background technology

Usually, the utilization of digital universal disk broadcasting device places the bit stream decoding of a video decoder to being read from a dish in it, and uses the scheme such as National Television System Committee (NTSC) standard that the video signal conversion of being deciphered is become simulated television (TV) signal.

Fig. 1 shows the formation of this general DVD playing device.In Fig. 1, spindle motor (SP) 104 rotating disks 102.Pickup unit 106 receives and is radiated dish 102 and by dish 102 light that reflected, with from coiling reading of data 102.In addition, this pickup unit 106 comprises that one can transmit the table top mechanism that this picked up and loaded this dish 102.

Radio frequency amplifier (RF-AMP) 108 amplifies the RF signal that is picked up by pickup unit 106, removes denoising, carries out analog-digital conversion and detects synchronous (sync) signal.Under the control of system controller 116, for from coiling 102 accurately reading of data, the rotation of servo controller 110 control panels 102 and this is picked up focus on and follow the tracks of.Be provided for digital signal processor (DSP) 112 from 8-14 modulation (EFM) signal of RF-AMP 108 outputs.

112 couples of DSP from coil the 102 EFM signals that read carry out demodulation and according to detected synchronously, the control of descrambling, error detection/correction and buffer 114 utilizes a phase-locked loop (PLL) to carry out the phase compensation of data.The transfer rate that writes dish 102 signal is greater than or the transfer rate of the signal that equals to read by DSP 112, thereby handled data temporarily are stored in the buffer 114 and are transmitted subsequently when MPEG video decoder 128 and mpeg audio decoder 130 need these data in DSP 112.Under the control of system controller 116, carry out this series of processes, thereby overflow or underflow phenomenon in buffer 114, can not occur.In addition, DSP 112 detects from the control data part of coiling 102 bit streams that read, and provides the data that detected to system controller 116.

Thereby the data from DSP 112 can be prevented digital copies by scrambling.In this case, this by the data of scrambling by a Content Scrambling System (CSS) decoder 122 descramblings.The data flow of this descrambling is one by the described program flow of Motion Picture Experts Group (MPEG) standard.This program flow includes one and has the video packets of MPEG-1 or MPEG-2 form, and one has the audio pack of MPEG, audio coding (AC)-3 or linear impulsive coded modulation (PCM) form, a sub-picture pack and a navigation bag.

122 pairs of bit stream descramblings that provided from DSP 112 of CSS decoder, demultiplexer (DEMUX) 124 with the descrambling flow point from becoming audio pack, video packets, sub-picture pack and navigation bag, 128 pairs of MPEG video decoders are deciphered by the video packets of Signal Separation, 130 pairs in mpeg audio decoder is by the decoding of the audio pack of Signal Separation and 132 pairs of being deciphered by the sub-picture pack of Signal Separation such as menu or title of subimage decoder.134 pairs of video datas of being deciphered of video mixer and sub-image data are carried out mixing, with digital video-analogue converter (DAC) 136 output transform of video mixer 134 are become an analog signal.Subsequently, by video encoder 138 outputs one analog encoding vision signal.Audio frequency DAC 140 outputs are by the voice data as simulated audio signal of mpeg audio decoder 130 decodings.

CPU (CPU) interface (I/F) is connected with system controller 116, thereby MPEG video decoder 128, mpeg audio decoder 130 and subimage decoder 132 are carried out decoding according to mpeg format in given timing place.

Being used for first memory 118 of the required various programs of storage system controller 116 can include an erasable programmable read-only memory (EPROM), before one controller 120 will by a remote controller by user's input or be sent to system controller 116 from the key data of the front panel of this playing device.

In order to be sent to the display device that is used for showing such as TV receiver or monitor from the video of a common DVD playing device and audio-frequency information, this DVD playing device uses the holding wire that presets to transmit this video and audio signal according to an analog interface.Just, between this DVD playing device and the display device that is used to show, directly connect many signal line by each connector to this display device one data-transmission channel is installed from this DVD playing device by the user, the first passage and second to the 6th passage that is used for audio frequency that promptly are used for video, thus the video and audio signal that is provided by this DVD playing device is sent to this display device with analog signal form by these holding wires.For the transmission of high-quality video information, separated and be transmitted by a special cable hypervideo (S-Video) output.But the transmission mode of this hypervideo output is an analog signal form.

In addition, in order to transmit a digital information, the DVD playing device has adopted Sony Philips digital interface (SPDIF), and vision signal outputs to its connector and is sent to this display device by holding wire as digital signal in this interface.But this SPDIF can not support such as the sophisticated functions by the operating state of this display device control DVD playing device or inspection DVD playing device.

Analog interface has during signal transmits by the shortcoming of noise jamming.Just, such as the quality of the connection status of connector, holding wire or whether produce the quality that various factors the noise all can influence the video and audio signal that is transmitted greatly near analog interface, and a fidelity that transmits signal is to be determined by the physical characteristic of this holding wire self.In addition, this analog interface has following other problem.

At first, need a DVD remote controller with control DVD playing device.Even television set is a display terminal, it also needs a remote controller that is used for controlling this television function.Therefore, connect many table apparatus if desired, so just need a plurality of remote controllers, thereby make the user become pretty troublesome.

Secondly, if analog interface is used to connect digital device, then can not implement the various types of network functions that a digital interface is provided.

If adopt the digital interface such as IEEE 1394, then the problems referred to above can be solved.But above-mentioned DVD playing device is to be used in having the television set of analog input reappearing and to make, and does not think over digital television.Therefore, even the DVD playing device is connected by IEEE1394 with Digital Television, also be difficult to use Digital Television to reappear the DVD information of current standard.Just, the receiver of receiving high-definition TV (HDTV) broadcasting (be used for) can handle and have the bit stream that bit stream DVD playing device storage simultaneously that MPEG-2 transmits stream (TS) form has MPEG-2 program flow (PS) form because a Digital Television, so, must carry out format conversion in advance from the MPEG-2PS form to MPEG-2 TS form for data are sent to the display unit that adopts MPEG-2 TS form from the DVD playing device by IEEE 1394 interfaces.

Summary of the invention

An object of the present invention is to provide a kind of being used for and send digital universal disc (DVD) information the equipment of a display unit to by network, wherein the demonstration of DVD information can be controlled by this display unit according to user's control command.

Another object of the present invention provides a kind of being used for and by network DVD information is sent to the method for a display unit, and wherein the demonstration of DVD information can be controlled according to user's control command.

To achieve these goals, according to one aspect of the present invention, provide a kind of equipment that is used for the network transmission information by comprising synchronizing channel and asynchronous paths, this equipment comprises: extractor is used for extracting the program flow of reading from recording medium; The transformat transducer is used for described program flow is converted to transmission stream; And output unit, transmitting the transmission stream of being changed by described network, subimage information and navigation information in the wherein said transmission stream are transmitted by described asynchronous paths.

According to another aspect of the present invention, a kind of equipment that is used for the network receiving information by comprising synchronizing channel and asynchronous paths is provided, this equipment comprises: receiver is used for receiving program flow by described network; The transformat transducer is used for described program flow is converted to transmission stream; With the user interface management device, be used for receiving user's order, subimage information and navigation information in the wherein said program flow are received by described asynchronous paths.

According to another aspect of the present invention, a kind of equipment that is used for the network receiving information by comprising synchronizing channel and asynchronous paths is provided, this equipment comprises: receiver is used for receiving by described network and transmits stream; With the user interface management device, be used for receiving user's order, wherein subimage information and navigation information are received by described asynchronous paths.

Description of drawings

Detailed description of preferred embodiments will make above-mentioned purpose of the present invention and advantage become more obvious in conjunction with the drawings.

Fig. 1 is the block diagram of ordinary numbers universal disc (DVD) playing device;

Fig. 2 is the block diagram of a conveyer according to a preferred embodiment of the invention;

Fig. 3 is the detailed diagram of the PS/TS transducer of Fig. 2;

Fig. 4 is the block diagram of a conveyer according to another embodiment of the present invention; With

Fig. 5 is the block diagram of a conveyer according to still another embodiment of the invention.

Embodiment

Referring to Fig. 2, being used in the device by a network transmission information according to a preferred embodiment of the invention, connect as digital universal disc (DVD) playing device of server (first device) with as the Digital Television (TV) of client's (second device) by a digital interface (for example IEEE 1394 cables).

In Fig. 2, the formation of spindle motor 204, pickup unit 206, radio frequency amplifier (RF-AMF) 208, servo controller 214 and digital signal processor (DSP) 210 and buffer 212 and operation are identical with these parts among Fig. 1, therefore their explanation are omitted.

If by scrambling, then 216 pairs of data that provided from DSP 210 of Content Scrambling System (CSS) decoder are carried out descrambling for the purpose that prevents digital copies from the data of DSP 210 output.This separates flow-disturbing is program flow with this mpeg standard defined, include one and have the video packets of MPEG-1 or MPEG-2 form, one has the audio pack of MPEG, audio coding (AC)-3 or linear impulsive coded modulation (PCM) form, a sub-picture pack and navigation (navigation) bag.

Here, navigation comprises the various types of information that can control a bit stream, for example menu button information, eye-catching information, angle Selection information and dish search information.In addition, be used for showing that the image information of title or menu is stored in the sub-picture pack.This menu is shown according to the screen control information of storage in the navigation bag, and it comprises the information such as the color of the color of the button positions on a screen, color, button quantity, a selected button and a performed button.

Under the control of system controller 220, PS to TS (PS/TS) transducer 218 will become to have the data that transmit stream (TS) form from the data transaction with program flow (PS) form that CSS decoder 216 is provided, audio/video (A/V) data that will have a TS form send Digital Television (TV) 240 to by the synchronizing channel of IEEE 1394 interfaces 230, and the navigation bag and the sub-picture pack that will constitute this program flow offer system controller 220.

IEEE 1394 interfaces 230 include a Web server with protocol stack, and this protocol stack includes a physical layer, an articulamentum, an IP (Internet Protocol) layer, an address resolution protocol (ARP) layer, on this articulamentum and transmits control protocol (TCP) layer, a User Datagram Protoco (UDP) (UDP) layer, a HTTP(Hypertext Transport Protocol) layer and a DHCP (DHCP) layer.At the application number of by name " Browser based Command and Control Home Network " is that the applicant has disclosed a kind of like this IEEE 1394 interfaces in 09/104299 the U.S. Patent application.In addition, these IEEE 1394 interfaces 230 can use A/V control and affairs set controls (AV/C CTS) order that is used between the control device, rather than as client/server scheme in the TCP/IP structure of internet.

System controller 220 reads desirable data by SERVO CONTROL, data search and facing control from coiling 202, and management DSP 210 and buffer 212, thereby the overflow or the underflow of the program flow of variable bit-rate can not occur having.In addition, a webpage is provided as the protocol stack that is used for online service device function, thereby can be according to carried out this online service device function by the coordinate information that Web browser detected of digital TV 240.Here, the work of this DVD playing device is to use an information that receives to be controlled by digital TV 240, rather than uses the remote signal of DVD playing device to control, and the content of this dish of resetting.

For voice data is PCM form and employed system does not comprise the situation of PCM decoder, can further comprise a linear PCM tone decoder 222.

Fig. 3 is the block diagram at the PS/TS transducer 218 shown in Fig. 2.This PS/TS transducer 218 includes navigation bag (NV-PCK) selector 252, sub-picture pack (SP-PCK) selector 254, video packets (V-PCK) selector 256, audio pack (A-PCK) selector 258, video buffer 260, audio buffer 262, buffer control unit 264, PAT TS packets of information (packet) generator 266, PMT TS packets of information generator 268, data TS packets of information generator 270, timing controller 272 and multiplexer 274.

Just, NV-PCK selector 252 and SP-PCK selector 254 extract navigation bag and the sub-picture pack that is used for Data Control from the PS that the CSS decoder 216 by Fig. 2 is provided.V-PCK selector 256 and A-PCK selector 258 extract video and audio pack from this PS, and video buffer 260 and audio buffer 262 temporary transient these bags that extracted that store.The data I/O of buffer control unit 264 control of video buffers 260 and audio buffer 262, and calculate the data volume of in video buffer 260 and audio buffer 262, being stored.

Here, with the layer structure of brief description MPEG-2 system.One program comprises video information, audio-frequency information and other data message.Among the MPEG-2 TS of defined, the various programs that comprise video, audio frequency and data message are changed by time-division multiplex in first-class in the MPEG-2 system.In addition, comprise PSI (program customizing messages) and receive a transport stream to extract audio frequency, video and data message rightly corresponding to desired program to allow a receiving system.Usually, PSI carries out with the sheet form such as program contingency table (PAT), program map table (PMT) or conditional access table (CAT).PAT and PMT are important.Each program only has a PMT, and what be referred to as packets of information identifier (PID) therein comprises that the sequence number (regular length with 188 bytes) in response to the TS packets of information of the video of program and audio stream is to summarize with these order.Just, the video flowing of this program is expressed as PID=XXXX and audio stream is expressed as PID=YYYY.

Usually, because in a TS, have a plurality of programs, so a plurality of PMT are arranged in this TS.Therefore, need a consolidated statement, be used for the various programs that transmit in the current TS are connected to the PID of the PMT of each program, such consolidated statement is PAT.Usually because a program represented by a program number, so the item of PAT comprise program number (=XXXX) and the information that concerns between regulation PMT and the PID.

Therefore, PAT TS packets of information generator 266 by being received from system controller 220 output the title id information and produce timing information by the packets of information that timing controller 272 is provided and produce PAT TS packets of information.PMT TS packets of information generator 268 by being received from system controller 220 output the title id information and produce timing information by the packets of information that timing controller 272 is provided and produce PMT TS information.The A/V data that data TS packets of information generator 270 receives from video buffer 260 and audio buffer 262, and under the control of timing controller 272, produce the data TS packets of information that comprises program clock reference (PCR) and express time mark (PTS).

Timing controller 272 produces timing information with packets of information and offers PAT TS packets of information generator 266 and PMT TS packets of information generator 268, thereby PMT TS and PAT TS are repeatedly produced in a predetermined interval.Transmit regularly Be Controlled in addition, thereby each PAT TS and the every 7msec of PMT TS are transmitted once.Timing controller 272 is by receiving from the information of the capacity of the relevant video buffer 260 of buffer control unit 264 and audio buffer 264 and the packets of information of control data TS packets of information generator 270 produces regularly.The output of multiplexer 274 multipath conversion PAT TS packets of information generator 266, PMT TS packets of information generator 268 and data TS packets of information generator 270 under the control of timing controller 272, and with MPEG-2 TS form transmission multipath conversion result.

Fig. 4 is the block diagram of an information transmission device according to another embodiment of the present invention.Compare with the formation of the device shown in Fig. 2, the DVD playing device that is used as server (first device) further comprises a sub-picture processor 322 and a navigation data processor 324.In addition, can further comprise a pcm audio decoder (not shown).Here omitted the MPEG video decoder and the mpeg audio decoder that normally comprise in the DVD playing device, this is because their function and the present invention are irrelevant.

In addition, the digital TV that is used as client (second device) includes MPEG-2 TS demultiplexer (DEMUX) 342, video decoder 344, tone decoder 346, video mixer 348, user interface management device 350, video DAC 352 and audio frequency DAC 354.

In Fig. 4, PS/TS transducer 318 offers MPEG-2 TS DEMUX 342 by the MPEG-2 TS that IEEE 1394 synchronizing channels will be used for the A/V data, and the sub-picture pack and the navigation bag that provide from PS to be extracted to sub-picture processor 322 and navigation data processor 324.

Sub-picture processor 322 is handled the sub-picture pack information from PS/TS transducer 318, and by IEEE 1394 asynchronous paths bitmap images information is sent to video mixer 348.324 pairs of navigation data processors are deciphered by the expression control information (PCI) of the navigation pack information that PS/TS transducer 318 is provided, and resulting screen control information is sent to user interface management device 350 by IEEE 1394 asynchronous paths, and receive the instruction of controlling the work of DVD playing device from the key input of digital TV by IEEE 1394 asynchronous paths, be used for the servo controller 314 of data search with control according to the user.Here, the screen control information that is used for subimage be included in pixel unit communicating control information form and relevant when, go screen where, which kind of color to show the information in the zone of subimage information with.The screen control information of subimage and bitmap images information is formatted so that be sent to the controller of display unit (digital TV) with predetermined format, i.e. video mixer 348 and user interface management device 350.

Simultaneously, at the client terminal that is used to receive DVD information, for example in the digital TV (DTV) that can show MPEG-2 TS information or the terminal of monitor, MPEG-2 TS DEMUX 342 will be separated into video flowing and audio stream from the TS of PS/TS transducer 318 outputs by IEEE 1394 synchronizing channels.

344 pairs of video flowings that separated of video decoder are deciphered and are utilized the MPEG-2 video format in a given decoded vision signal of timing place output under the control of user interface management device 350.In addition, 346 pairs of audio streams that separated of tone decoder are deciphered and are utilized the MPEG-2 audio format in a given decoded audio signal of timing place output under the control of user interface management device 350.

Video mixer 348 further comprises a general function of the screen display that is used for simple graph information, and will be complementary with and position synchronous with a vision signal mixing, and export these mixed frequency signals to video DAC 352 from the subimage that the DVD device transmits according to the screen control information that transmits and its.

Just, when the order of the subimage information import demonstration such as menu screen or title by a user, according to the bitmap images information of the subimage that is transmitted from the sub-picture processor 322 of this DVD device by IEEE 1394 asynchronous paths and the screen control information that produced and be transmitted by the IEEE1394 asynchronous paths by navigation data processor 324, video mixer 348 is represented a bitmap images for a given time quantum by graphics overlay on a corresponding screen position.

The function that relates to this video mixer 348 of graphics overlay can be implemented by the browser that is inserted in this device.In this case, this browser shows subimage on a screen.

Be different from the conventional user interface management device that the control of interface therein is limited to corresponding device thereof, this user interface management device 350 can receive from user's a order that relates to this DVD playing device and to this DVD playing device and transmit this order, therefore allows the user to select this DVD information.

Just, when the user used a remote controller to import an order that relates to DSI (data search information) with the work of control DVD playing device by key, user interface management device 350 transmitted the DSI order by the IEEE1394 asynchronous paths to the navigation data processor 324 of this DVD playing device.In addition, when relating to the order of PCI (expression control information) by user's input, the order that user interface controller 350 transmits the color of the respective regions that for example changes this bitmap images according to the PCI that is stored in the there to video mixer 348.Navigation data processor 324 is used for controlling the servo controller 314 that coils 302 accesses to DVD according to the DSI order control that transmits by IEEE 1394 asynchronous paths.

In the modification of the formation of Fig. 4, from the decoded bitmap images information of subimage information be used on a screen, showing that the screen control information of this bitmap images can be transmitted together with audio frequency and/or video (A/V) information by IEEE 1394 synchronizing channels.In this case, the DVD playing device need be used for selectively transmitting the circuit (selection control) of this bitmap images and screen control information or A/V information, and must set up how a regulation transmits this bitmap images by IEEE 1394 synchronizing channels standard.

Fig. 5 shows the block diagram of an information transmission device according to another embodiment of the present invention.Compare with the formation of device shown in Figure 4, the PS/TS transducer 416 of DVD device is sub-picture pack and navigation bag with the PCI that extracts from the PS into TS that packs, and with PAT TS, PMT TS and data TS packets of information multipath conversion subimage and navigation information bag.418 pairs in navigation DSI decoder has the navigation bags decoding from the DSI of PS/TS transducer 416 outputs, and receives by IEEE 1394 asynchronous paths from a navigation command that DTV transmitted.In addition, this DTV further includes after they are by MPEG-2 TS DEMUX 442 Signal Separation and respectively sub-picture streams and navigation is flowed subimage decoder 448 and the navigation PCI decoder of deciphering 450.

In Fig. 5, PS/TS transducer 416 navigation DSI decoders 418 provide the navigation bag with DSI information that is extracted in the PS of CSS decoder 414 input, and will have the navigation bag of PCI and sub-picture pack is packaged into navigation TS bag and subimage TS wraps under the control of system controller 220.PS/TS transducer 416 is with PAT TS, PMT TS and data TS packets of information multipath conversion navigation TS packets of information and subimage TS packets of information, and by IEEE 1394 synchronizing channels its result is sent to DTV.418 pairs of navigation DSI data decodings that provided from PS/TS transducer 416 of navigation DSI decoder also store the data of being deciphered.

In addition, the MPEG-2 TS DEMUX 442 of DTV will be separated into video flowing, audio stream, sub-picture streams and navigation stream by the MPEG-2 TS that IEEE 1394 synchronizing channels are transmitted.Under the control of user interface management device 454, video decoder 444 decoding video-flows also provide the vision signal of being deciphered to video mixer 452, tone decoder 446 decoding audios flow and provide the audio signal of being deciphered to audio frequency DAC458, subimage decoder 448 decoding sub-picture streams also provide bitmap images information and navigation PCI decoder 450 decoding navigation streams and the order that relates to PCI are provided to video mixer 452 to video mixer 452.

When importing the order of the subimage information of a demonstration such as menu screen or title by the user, user interface management device 454 offers video mixer 452 with this order, and this video mixer 452 utilizes the diagram top layer in corresponding screen position the bitmap images that is provided by subimage decoder 448 to be provided and to pass through video DAC 456 these results of output.

When user's input relates to the order of PCI, user interface management device 454 is sent to navigation PCI decoder 450 with this order, and navigation PCI decoder 450 is handled this user's order according to decoded and storage PCI within it, and transmits control commands corresponding to video mixer 452.

Video mixer 452 shows the subimage information that is transmitted from subimage decoder 448 according to the order from user interface management device 454 and navigation PCI decoder 450 on a screen, wherein the pixel value corresponding to special sub-image area is changed to showing subimage information.For example, select on shown menu the user in the situation of a new button, 450 pairs in navigation PCI decoder specifies in the letter bag of the part of the reformed sub-image area of brightness value in decoded and the record PCI information within it and searches for, and provides an order to change this bright spot value to video mixer 452.Then, video mixer 452 changes the pixel value of corresponding sub image section to show.By above-mentioned processing, the user can change on the menu that is used for DVD control that is shown on the DTV screen by the button of highlight.Subsequently, when the user was chosen in a specific button on the menu, corresponding order was sent to the navigation DSI decoder 418 of DVD playing device to carry out corresponding order by IEEE 1394 asynchronous paths.

Therefore, user interface management device 454 receives from user's the order that relates to the DVD playing device and analyzes that this order sends video mixer 452 to ordering accordingly, PCI decoder 450 or DVD playing device navigate.

In a remodeling of device shown in Figure 5, the decoding by navigation DSI decoder 418 in this DVD playing device can be implemented in display unit (DTV).Just, all information of reading from DVD are converted into MPEG-2 TS and are sent to display unit, and the decoder that the display unit utilization is inserted is wherein deciphered the data with MPEG-2 TS form that are transmitted, and provides this result to the user.Here, the difference between this modification shown in Fig. 5 and this device is that all navigation informations that comprise PCI and DSI are decoded in display unit.For this reason, display unit transmits a position command with direct access DVD information by IEEE 1394 asynchronous paths to the system controller of DVD playing device, and this system controller control is got the servo controller of controlling to taking inventory subsequently.For example, when pushing the play button of the remote controller that is used for display unit, an order that indicates the disk address of the information that is read is sent to the DVD playing device.

In another remodeling of this device shown in Figure 5, the navigation PCI decoder that is inserted in display unit can be configured in the DVD playing device.In this case, in the PS/TS transducer, there is no need the navigation information multipath conversion is become TS and sends navigation information to display unit.The navigation information that reads from DVD can be handled by the navigation decoder that inserts in the DVD playing device.In this PCI of decoding, transmit the order of the pixel of specifying the subimage that its pixel value will change to the video mixer of display unit by IEEE 1394 asynchronous paths.Here, the navigation that relates to control command from all of user is sent to the DVD playing device by IEEE 1394 asynchronous paths.

As mentioned above, in the device that is used for DVD information being sent to the display unit of MPEG TS format analysis processing data by IEEE 1394 interfaces, this PS form is converted into the TS form, like this can be easily and the display unit interfaces that adopts mpeg format according to information transmission device of the present invention.

In addition, because DVD information transmits as digital signal by IEEE 1394 interfaces, information transmission device according to the present invention has the quality that can occur hardly owing to be connected medium and characteristic reduces signal and because noise makes the phenomenon of video and audio signal deterioration so compare with the analog interface of routine.

In addition, can not cause user's trouble owing to two devices being connected with many signal line.Just, utilizing wall scroll IEEE 1394 cables that two devices are linked to each other is enough to transmit all information, does not so just relate to the relevant problem of selecting the high-quality signal line.In addition, owing to be used for the plug-and-play feature of this connection status of self check, set up relevant two information how device connects thereby need not the user.

According to the present invention, owing to the operation of DVD playing device can be controlled by the order that a remote controller that is used for display unit is imported, thus be easy to realize user interface, and need not to be used for the independent remote controller of each device.

In addition, IEEE 1394 interfaces according to the present invention allow these device networkings, thereby these devices can integrally be managed and operate.In addition, can be by this DVD playing device of IEEE 1394 buses as a server based on the home network of browser.

Claims (4)

1, a kind of being used for comprises by comprising the equipment of the network transmission information of asynchronous paths at least:

Extractor is used for extracting the information of the program flow form that reads from recording medium;

Output unit transmits subimage information and navigation information in the information of being extracted by described asynchronous paths.

2, equipment as claimed in claim 1, wherein said equipment also comprises the user interface management device, is used for receiving user's order.

3, equipment as claimed in claim 1, wherein said equipment also comprises:

Sub-picture processor is used for the subimage that extracts from program flow is deciphered to produce bitmap images information and to be used for transmitting the bitmap images information that is produced by described asynchronous paths.

4, equipment as claimed in claim 3, wherein said equipment also comprises the navigation data processor, is used for coming control information to read according to the Navigation Control order that receives by described asynchronous paths.

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