CN100461286C - Recording and playback control method of transport stream data - Google Patents

Abstract

The present invention relates to the embodiment of the recording and playing control method of transmission stream data. In the digital broadcasting product, the recording and playing method can record and play the transmission stream on the optical disk medium. The present invention aims to provide a combination machine that can demodulate and encrypt the playback signal received from the tuner/demodulator in the combination machine of the PVR/DVD module, buffer it to the hard disk, and generate and record it. Corresponding to the file of the DVD medium, then open and read the transport stream file recorded on the DVD medium, and buffer it to the hard disk for descrambling processing, and finally play the recording and recording of the transport stream data in the image encoder Playback control method. The invention can realize the purpose of stable data transmission and reception, minimize the disadvantage of time delay caused by buffering, and ensure the real-time transmission of data.

Description

Recording and playback control method of transport stream data

technical field

The present invention relates to the technique of storing and playing control method of transport stream data which can record and play high-definition HD (High Definition) transport stream into DVD in digital broadcasting products.

Background technique

Generally speaking, a digital broadcast signal receiver uses HDD (Hard Disc Drive) as a storage medium in the process of storing and playing a received data stream (Data stream) or playing while storing it. For this reason, the main features and structure of the digital broadcast signal receiver are shown in Figure 1.

FIG. 1 is a schematic structural diagram of a conventional digital broadcast signal receiver.

As shown in Figure 1, the digital broadcast signal receiver is composed of the following structure: that is, a tuner (Tuner)/demodulator (Demodulator) 2 that can receive broadcast signals from any service medium and output digital data, and a pair of slave tuners. A stream controller 4 that adjusts the transmission path of the transmitted data stream in the device/demodulator 2, a demultiplexer (DEMUX: Demultiplexer)/MPEG (Moving Picture Experts Group) encoding that is connected to the output port of the stream controller 4 Device 6, MPEG memory 8 connected to demultiplexer/MPEG encoder 6, RAM12, CPU14, ROM16, user interface 18, HDD20 uniformly connected to system bus 10.

The tuner/demodulator 2, under the control of the CPU 14 via the system bus 10, converts the playback signal input from any service medium through the input line 1 into a digital data stream, and outputs it externally.

The above code stream controller 4 transmits and saves the data stream output from the tuner/demodulator 2 to the HDD 20 under the control of the CPU 14 via the system bus 10, or inputs it to the demultiplexer/MPEG encoding device 6 for data playback.

In addition, under the control of the CPU 14, the stream controller 4 transmits the data stream input from the HDD 20 through the system bus 10 to the demultiplexer/MPEG encoder 6 for data playback.

As shown in Figure 1, the above-mentioned demultiplexer/MPEG encoder 6 selects the data stream (TP_dataout) input from the code stream controller 4 under the control of the CPU14, saves it in the MPEG memory 8, and reads The saved data stream is coded in MPEG mode, and then output through the output line 7 . Here, the CPU 14 will perform control tasks corresponding to user commands input from the user interface 18 via the system bus 10 . For example, the CPU 14 will switch the channel in the tuner/demodulator 2 and switch the transmission path of the data stream in the stream controller 4 according to the command input by the user. In addition, the CPU 16 also selects the input data stream in the demultiplexer/MPEG encoder 6 according to commands entered by the user. Here, RAM12 and ROM16 will be used for the control operation of CPU14.

The conventional digital broadcast signal receiver will save the data stream received by HDD20 and play it or save it during playing. At this time, the received data stream usually includes multiple broadcast programs, but the user does not necessarily have to watch multiple received broadcast programs at the same time, but only chooses to watch the broadcast programs he likes.

Recently, with the practical development trend of digital broadcasting, various digital products are being actively developed and widely sold. In addition, new products with PVR (Personal Video Recoder) function can be seen in the market recently.

At present, the DVD RW (Digital Versatile Disc ReWritable) instrument mainly adopts the way of saving the PS (Packet Stream) playback code stream or the analog output form of saving the encoded HD code stream. Therefore, it has become impossible to save and play the real-time playback stream without image quality degradation.

That is, in the conventional technology, DVD products that can reduce the video code stream include DVD-Video and DVD-VR (VideoRecoder), which can only save SD (Standard Definition) code stream. At this time, as a DVD video quality, it can save about two hours of data, which directly leads to the inability to save the currently playing HD (High Definition) digital TV (DTV) video stream in the DVD media. The problem. Therefore, many users have demanded that even if the playback time is reduced, HD-level video streams should be permanently stored in DVD devices.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems existing in the conventional technology, to provide a record that can change the DVD disc format in the DVD RW and PVR combination machine, and can save and play the data in the DVD medium in the form of HD bit stream and playback control methods.

According to other characteristics of the present invention, also will provide a record data that can record data with DVD format (DVD-Video, DVD-VR), and identify and play the recording and play control method of the transport stream data of the data that is recorded on the DVD medium .

In order to achieve the above object, the recording method of transmission stream data in the present invention is made up of following several steps: Namely,

The first step is to select and load the HD (High Definition) record selection DVD medium into the guide field, display the record format identification user information;

The second step is to encrypt the transmission stream input through the tuner/demodulator through the stream controller;

The third step is to temporarily store the encrypted transport stream in the hard disk, and send it to the DVD controller through the system bus;

The fourth step, after receiving the transport stream by the DVD controller, will generate a code stream file on the DVD medium, then save and record the above-mentioned code stream received in the above-mentioned file;

The fifth step, after determining whether the user has input the stop command, when the user inputs the stop command, stop the data recording immediately, and close the file currently being recorded, then extract the code stream information received above, and generate the code stream information file, Finally, the extracted stream information is recorded.

In the present invention, the play method of transport stream data is made up of following several steps: That is,

The first step, once the optical disc medium is loaded, reads the identification user information of the recording format from the boot area of the DVD medium to confirm whether there is an order for transport stream recording;

The second step, if it is a DVD media recording transport stream, find the transport stream directory, and open the code stream file information to identify the basic information of the code stream to be played;

The third step is to open and read the code stream file according to the basic information of the code stream identified above;

The fourth step is to dump the read transport stream from the CPU to the hard disk, and buffer it, and then descramble the transport stream through the transmission controller;

In the fifth step, the above-mentioned descrambled transport stream is encoded and played by the image encoder.

Effect of the present invention:

Through the method for recording and playing control of transport stream data in the present invention, the HD-level playback code stream in the DVDRW and PVR combined machine can be recorded on the optical disc medium in real time according to the format of the DVD medium, and the code stream can be recorded by identifying the code stream. DVD media for effective image playback processing. Accordingly, it can effectively overcome the current DVD

The storage limit of RW, and through the buffering process performed by the hard disk device, stable data transmission and reception are realized.

In addition, the technology of the present invention also minimizes the disadvantage of time delay caused by buffering through the high-speed data transmission and reception effect between the DPRAM device and the DVD RW module, and ensures real-time transmission of data. In order to further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of conventional digital broadcast signal receiver;

Fig. 2 is in the embodiment of the present invention, the structural representation of the storage and play control system of transport stream data in DVD RW and PVR combined machine;

Fig. 3 is that the guide of the DVD-Video of DVD medium among the present invention enters the field schematic diagram;

Fig. 4 is a schematic diagram of the structure of the control data field in Fig. 3 in the present invention;

FIG. 5 is a schematic structural diagram of the content providing media information domain in FIG. 4;

FIG. 6 is a schematic diagram of a directory structure of an HD-DVD disc in an embodiment of the present invention;

Fig. 7 is in the present invention, the schematic diagram that guides into the inner field in the DVD-VR format of DVD media;

Fig. 8 is a schematic diagram of the structure of the control data field in Fig. 7;

FIG. 9 is a schematic structural diagram of the content providing media information domain in FIG. 8;

FIG. 10 is a flowchart of a recording control method for transport stream data in an embodiment of the present invention;

Fig. 11 is a flowchart of a method for controlling playback of transport stream data in an embodiment of the present invention.

Explanation of the symbols of the main parts in the accompanying drawings:

100...1st Module 101...Tuner/Demodulator

103...Bit stream controller 105...Bus bridge

107...HDD 109, 115, 133...SDRAM

111...CPU120...DPRAM

130...2nd module 131...DVD controller

135...DVD loader

Detailed ways

The implementation of the method for controlling the recording and playing of transport stream data of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to Fig. 2, Fig. 2 is a structural schematic diagram of the storage and playback control system of the transport stream data in the DVD RW and PVR combination machine in the embodiment of the present invention.

As shown in FIG. 2 , the structure of the present invention consists of a first module 100 with PVR function, a second module 130 required for saving and playing data to DVD media, and an interface device 120 connecting the first module 100 and the second module 130 .

Above-mentioned 1st module 100 transmits the transport stream (TS: Transport Stream) that demodulation process will be carried out to encrypted The stream controller (TScontroller) 103 in the transport stream (ETS: Encryption TS) of processing, the bus bridge (PCI/IDE Busbridge) 105 that is connected on the system bus (PCI bus), transmits by the bus bridge 105 The hard disk (HDD) 107 for buffering the transport stream, the system memory (SDRAM, 109) for temporarily storing the transport stream, the central processing unit 111 for controlling various components through the system bus, the MPEG encoder 113 for playing the transport stream, A memory (SDRAM, 115) for temporarily storing data during playback.

Above-mentioned 2nd module 130 is by the required DVD controller 131 of control DVD loader (loader, 135); Through above-mentioned DVD controller 131, the DVD storage (SDRAM, SDRAM, SDRAM, 135) that the data recorded and played in the DVD medium is carried out temporary preservation. 133) Composition.

The interface device 120 is composed of DPRAM (Dual-PortRAM).

The transport stream data storage and playback system and method thereof in the DVD RW and PVR combined machine in the embodiment of the present invention with the above-mentioned structural characteristics will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 2 , the combined machine is composed of the structure of the first module 100 and the second module 130 , and the first module 100 and the second module 130 are connected through the interface device 120 to transmit and receive data.

Here, the first module 100 is a PVR module, the second module 130 is a DVD (digital video disk, digital versatile disc) RW (read/write) module, and the interface device 130 uses a dual-port random access memory DPRAM (dual port memory) .

Above-mentioned first module 100 is made up of tuner/demodulator 101, stream controller 103, bus bridge (PCI/IDEbus bridge) 105, system memory 109, CPU111, MPEG encoder 113, memory 115.

The above-mentioned tuner/demodulator 101 will receive the broadcast signal through the channel selection of the digital broadcast signal, and convert the received broadcast signal into a digital transport stream (TS: Transport Stream) and output it externally.

Above-mentioned stream controller 103 is connected on the system bus (PCI BUS), and under the control of CPU111, carries out the encryption processing (Encryption) required for filter processing and anti-duplication to the PID (Packet ID) of the transport stream that is demodulated processing. ), and then save it to the internal buffer (buffer).

Above-mentioned CPU 111 reads a certain amount of code stream data through PCI (peripheral component interconnect) bus 104, then temporarily saves it in the system memory 109, and after re-reading, passes through the bridge 105 that is connected on the PCI bus 104 , and save it to HDD107.

Here, since the transport stream is encrypted by the code stream controller 103 , effective content protection can be performed on the HD code stream without additional encryption processing. At this time, the code stream data stored in the HDD 107 is converted into source data and then transferred to the second module 130 .

In addition, since the terrestrial HD code stream belongs to the transport stream (TS) format, it needs to be buffered in order to directly store the transport stream format on DVD-RW media. At this time, use the hard disk as a buffer device, and when saving it to the hard disk, it will be saved in the form of 4Byte Time Stamp and TS188Byte ncryption.

In order to record the above-mentioned data, the CPU 111 transmits control data corresponding to the state of the interface of the second module 130 to the DVD controller 131 of the second module 130 . That is, control data is transferred in order to convert the above-mentioned data into a state where data transfer can be performed.

The CPU 111 temporarily saves the stream data stored in the HDD 107 in the system memory 109 , and then transfers control to the DVD controller 131 of the second module 130 . At this time, the DVD controller 131 of the second module 130 will read the code stream data stored in the system memory 109 of the first module 100 through the interface device 120, and then save it in the DVD memory 133 of the second module 130 .

The DVD controller 131 of the above-mentioned second module 130 uses a DVD loader (Loader) 135 to record the stream data stored in the DVD memory 133 to a DVD medium at a specific multiple. At this time, since the data recorded in the DVD medium is encrypted code stream data, the purpose of anti-copying can be achieved, that is, a device capable of content protection can be achieved.

When data is recorded to a storage medium (DVD, etc.), information about related programs is also stored. At this time, since the copy status feature of the program exists in the saved information, information such as anti-copy (Copy Never, Copy Once) can be saved at the same time.

As the interface device 120 connecting the first module 100 and the second module 130, DPRAM can minimize the transmission time of transmitting data between the first module 100 and the second module 130 through buffer processing, so as to realize real-time transmission of data and receiving purposes.

The above-mentioned DPRAM120 adopts a dual-port random access memory (DPRAM: dual port ram) to ensure high-speed data transmission efficiency between two processors (CPU, DVD controller), and divides the field of the dual-port random access memory into two channels ( transfer control, data transfer). In the data transmission channel, in order to improve the efficiency of data transmission, no additional transmission protocol data will be added, but only the size information of the module unit will be transmitted. Here, the control information of the data transmission channel will be processed by the transmission control channel.

In addition, the data recorded in the DVD medium of the second module 130 will be replayed in the reverse order of the above-mentioned process. That is, the DVD controller 131 of the second module 130 reads data from the DVD medium, and uses the DVD memory 133 to temporarily store the data in the DVD memory 133 . At this point, the CPU 111 re-saves the data stored in the DVD memory 133 to the system memory 109 and the HDD 107, and descrambles it through the stream controller 103, and then performs descrambling on it through the MPEG encoder (Decoder) 113. Encoding and playback processing.

Here, as the interface device connecting the PVR module and the DVD RW module, the use right of DPRAM depends on whether the system belongs to the playback mode or the recording mode, and according to the above conditions, it is decided to adopt the CPU of the PVR module or the DVD controller 131 of the DVDRW module. .

In other embodiments of the present invention, the mode of real-time playing into the MPEG encoder 113 can also be implemented while saving the received transport stream data into the HDD 107 . In this mode, the encryption process of the stream controller will be ignored.

The combination system described above is a system that sets a format for storing HD bit streams in DVD media, and performs recording and playback in accordance with the format. As an embodiment of the above-mentioned system principle, the DVD formats currently used for DVD media recording can be divided into DVD-Video and DVD-VR, and HD streams can be stored in the optical discs of these two formats.

The VDD-Video format will be described in detail below with reference to accompanying drawings 3 to 6 .

Fig. 3 is a schematic diagram of the DVD-Video of the DVD medium in the present invention leading into the field; Fig. 4 is a schematic diagram of the control data field structure of Fig. 3 in the present invention; Fig. 5 is a schematic structural diagram of the content of Fig. 4 providing the media information field ; FIG. 6 is a schematic diagram of the directory structure of the HD-DVD disc in the embodiment of the present invention.

As shown in Figure 3, the lead in area of DVD-Video consists of zero time zone (initial zone), reference code zone (reference code zone), buffer zone 1 (buffer zone 1), control data zone (control data zone) ), buffer zone 2 (buffer zone2), and data area (data area), and these areas will be divided by the number of sectors.

In addition, the control data zone in FIG. 3 has the same structure as the control data module in FIG. 4 . As shown in Figure 4, the control data consists of information fields such as physical format information, disc manufacturing information, and content provider information.

Here, the maximum transfer rate of the optical disc will be recorded with previously set information of "0011b" in the field of physical format information, which means 20.16 Mbps. As shown in FIG. 5 , the content providing media information field will be set as HD-DVD identification user (ID) desktop, so that the user can identify (0: SD, 1: HD) whether the disc is an HD format disc.

In addition, the HD DVD disc adds the HD code stream directory (Directory) to the conventional DVD video disc, forming the directory structure in Figure 6.

That is to say, it can be divided into at least three folders (Video TS, Audio TS, HD STREAM) along the root, and corresponding files are stored in each folder. In addition, the HD stream file is composed of a paired file of a playback file (HD_STRAEM.VOB) and an information file (HD_STREAM.IFO).

The DVD-VR format will be described in detail below with reference to Fig. 7 to Fig. 9 .

Fig. 7 is in the present invention, the schematic diagram of the DVD-VR format of the DVD medium leading into the inner field; Fig. 8 is the structural diagram of the control data field of Fig. 7; Fig. 9 is the structural diagram of the content providing media information field of Fig. 8.

As shown in Figure 7, the lead in area of DVD-Video consists of zero time zone (initial zone), system reserved zone (System reserved zone), buffer zone 0 (buffer zone0), RW physical domain (RW Physical), format disc zone, reference code zone, buffer zone 1, control data zone, buffer zone 2, data area and other fields, and these fields are also divided by the number of sectors.

In addition, the above-mentioned control data zone (control data zone) has the same structure as the RW-physical format information (RWphysical format information) module in FIG. 8 . As shown in Figure 8, the RW physical format information structure is composed of information fields such as reserved field (Reservde), disc manufacturing infromation field (disc manufacturing infromation), physical format information field (physical format information), and reserved field (reserved).

Here, the maximum transfer rate of the optical disc will be recorded with previously set information of "0011b" in the field of physical format information, which means 20.16 Mbps. Referring to FIG. 9, as shown in FIG. 9, the reserved area will be set as HD-DVD identification user (ID) desktop, so that the user can identify (0: SD, 1: HD) whether the disc is an HD format disc.

In addition, the HD DVD disc adds the HD code stream directory (Directory) to the conventional DVD video disc, forming the directory structure in Figure 6. That is, it can be divided into at least three folders (Video TS, Audio TS, HD STREAM) along the root, and corresponding files are stored in each folder.

The method of data recording (recording) from DVD to HD will be described in detail below with reference to the schematic path diagram in FIG. 2 .

Referring to FIG. 10, FIG. 10 is a flow chart of a recording control method for transport stream data in an embodiment of the present invention, as shown in FIG. 10:

S101, confirm whether the user selects HD recording phase selection.

S103, S105, when the user selects the HD recording phase selection, sense the loading information of the DVD disc, and then when the DVD disc is loaded, record the HD-DVD in the guide to identify the user, and display it as saving the HD code stream information on the disc.

S107. In addition, the transport stream that is subjected to channel selection and demodulation processing by the tuner/demodulator will be subjected to PID (Packet ID) filtering processing and encryption processing (encryption) through the stream controller.

Here, the purpose of encryption processing is to prevent copying.

S109, S111, in addition, the encrypted transport stream will be temporarily stored in the HDD for buffering, and then through the PCI bus, will be read in the order of the transport stream data stored in the HDD by the CPU, and passed DPRAM is transferred to the DVD controller of the second module (S111).

S113, at this point, the DVD controller will temporarily save the data input into the DVD memory, and generate a recording file (for example, HD_STRM1.VOB) in the DVD disc, and then record the code stream data stored in the DVD memory to the above-mentioned file Inside.

S115, S117, after this, will confirm whether to receive the stop command that the user inputs, and when receiving the stop command that the user inputs, will close (close) the file (namely, HD_STRM1.VOB) in the current record, and detect the recorded Code stream, from which the code stream information is extracted, and then the record information file (for example, HD_INF01.IFO) of the disc is generated, and various information of the related record file (HD_STRM1.VOB) is recorded, that is, bit rate, time, and channel information.

Here, the recording of a recording code stream will be divided into a recording file and a recording information file, and different recording code streams will be distinguished by serial numbers.

S119, S120, thereafter, determine whether the user continues to record other content in the current optical disc. If the user continues to record other content in the current optical disc, then the serial number will be increased the same as that of the recorded file (eg, HD_STRM2.VOB), and the process after step S113 will be repeated.

If the user does not continue to record other content, the process ends.

In addition, the playback method of the HD code stream recorded in the DVD disc is shown in FIG. 11. FIG. 11 is a flow chart of the playback control method of transport stream data in the embodiment of the present invention, as shown in FIG. 11:

S121, S123, once the HD-DVD disc is loaded, read the DVD disc from the DVD controller to guide the HD-DVD in the inner field to identify the user's desktop.

S125, S127, at this time, confirm whether the HD code stream is in the recording mode, if it is in the recording mode, search for the directory for recording the HD code stream, and open the recording information file.

S129, then, extract the basic information of the HD code stream recorded in the recording information file, open the corresponding recording file (HD_STRM1.VOB), and read the file with a specific multiple.

S131, S133, in addition, the CPU will receive the HD code stream read by the DVD controller through the DPRAM, and save it to the HDD for buffering, and then re-read the code stream and send it to the code flow controller. After the above code stream controller performs descrambling processing on the HD code stream, it encodes the HD code stream through the MPEG encoder, so as to realize the purpose of image playback.

S135, S137, at this time, judge whether the user needs to open other files, if the user needs to open other files, then increase the serial number of the file, and repeat the above process to achieve the purpose of image playback.

If the user does not need to open other files, the flow ends.

As mentioned above, through the recording and playback control method of transport stream data in the present invention, the HD-level playback code stream in the DVDRW and PVR combined machine can be recorded on the optical disc medium in real time according to the format of the DVD medium, and can be identified and recorded. The code stream of DVD media enables effective image playback processing. Accordingly, it can effectively overcome the storage limit of the current DVD RW, and achieve stable data transmission and reception through the buffering process performed by the hard disk device.

In addition, the technology of the present invention also minimizes the disadvantage of time delay caused by buffering through the high-speed data transmission and reception effect between the DPRAM device and the DVD RW module, and ensures real-time transmission of data.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than as a limitation to the present invention, as long as within the scope of the spirit of the present invention, the above-described embodiments Changes and modifications will fall within the scope of the claims of the present invention.

Claims (2)

1. the recording method of a transmit flow data is characterized in that being made up of following several steps:

First step, in the field that leads in of the DVD medium of selecting and be written into high definition record option, displayed record form and recognition user information;

Second step, by the code stream controller, to carrying out encryption by the transport stream of tuner/demodulators input;

Third step, the transport stream that will be carried out encryption are saved in the hard disk temporarily, and by system bus, send it to DVD controller;

The 4th step, after receiving transport stream by the DVD controller, will be on the DVD medium generated code stream file, then the above-mentioned transport stream that receives is preserved and is recorded in the above-mentioned ASCII stream file ASCII;

The 5th step, definite user whether import cease and desist order after, when user's input is ceased and desisted order, stop to carry out data recording immediately, and close the current file that is writing down, extract the code stream information of above-mentioned reception then, and generated code stream information file, at last the code stream information that is extracted is recorded in the code stream information file.

2. the player method of a transmit flow data is characterized in that being made up of following several steps:

First step, in case be written into disk medium, just from the field that leads in of DVD medium, the recognition user information of reading and recording form is to confirm whether to exist the order of transport stream record;

Second step is if the DVD medium of record transport stream just find the transport stream catalogue, and open code stream file information, needs the code stream essential information of playing with identification;

Third step, according to the code stream essential information of above-mentioned identification, open and the readout code stream file;

The 4th step, from CPU, to the above-mentioned transport stream that reads of hard disk unloading, and it is carried out buffered, by transfer control, above-mentioned transport stream is carried out scramble process then;

The 5th step, by image encoder, carried out encoding process to above-mentioned by the transport stream of scramble process, and it carried out playback process.

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