WO2011116645A1

WO2011116645A1 - Method and system for download contents of push video on demand service

Info

Publication number: WO2011116645A1
Application number: PCT/CN2011/070933
Authority: WO
Inventors: 王同刚
Original assignee: 深圳市同洲电子股份有限公司
Priority date: 2010-03-23
Filing date: 2011-02-11
Publication date: 2011-09-29
Also published as: CN101789975B; CN101789975A

Abstract

A method for download contents of Push Video On Demand (PVOD) service includes that: a server side loads description information of a file to be pushed into a PVOD control webpage file, encapsulates the PVOD control webpage file into a Packet Elementary Stream (PES) data packet; after utilizing the PES data packet to form a transport stream, the server side modulates and outputs the transport stream; a digital television reception terminal demodulates the received transport stream to obtain the PVOD control webpage file, and a user selects PVOD files to be downloaded from the PVOD control webpage file according to the need of himself; the digital television reception terminal generates a download file list according to the selection of the user, parses data in the corresponding file to be pushed in the download file list from the transport stream which is pushed by the server side and contains the file to be pushed, and stores the parsed data in a local storage equipment. A system for download contents of push video on demand service is also disclosed in the present invention. By using the present invention, the flexibility of the PVOD service can be improved, and the individuation requirements of the users can be satisfied.

Description

Method and system for pushing downloaded content of video on demand service

This application claims the priority of the Chinese patent application filed on March 23, 2010, the Chinese Patent Office, Application No. 201010139812.6, entitled "Method and System for Downloading Contents for Video-on-Demand Services", the entire contents of which are The citations are incorporated herein by reference.

Technical field

The present invention relates to an on-demand technology, and in particular, to a method and system for downloading content of a Video On Demand (PVOD) service.

Background technique

The PVOD service is a new type of digital TV value-added service. Based on the push technology, it uses the idle broadcast channel to automatically push various extended service contents to the user's digital TV receiving terminal without hindering the TV user from watching the program normally. (STB, Set Top Box) The local hard disk that comes with the user can choose to read from the local hard disk of the digital TV receiving terminal at any time to enjoy the extended service contents provided by the digital TV operator. It can be a video or other data content such as a web page.

FIG. 1 is a schematic flowchart of a method for acquiring a PVOD service, where a packet basic elementary stream (PES, Packetize Elementary Streams) packet is pre-set, and a payload portion of the PES packet encapsulation format includes: a fragment description and file data. Fragment. The process shown in FIG. 1 includes: Step 101: The server carries the data in the file to be pushed, that is, the data in the PVOD file, in the file data segment, and the description information of the file to be pushed is carried in the segment description, and is encapsulated into one. The above PES packet.

In this step, the description information of the file to be pushed includes the file name and the file type identifier.

There are two types of files to be pushed on the server side: description files and content files. The content file includes content data corresponding to the video and the data content, and the description file includes a description letter describing the overview of all the content files on the server side, 3⁄4.

Step 102: The server uses the PES packet to form a transport stream (TS, Transport Stream) to modulate the output.

Step 103: The digital television receiving terminal demodulates the received transport stream.

In this step, the digital television receiving terminal first receives the description data in the description file pushed by the server, and then receives the content data in the content file pushed by the server. Step 104: The digital television receiving terminal uses the segment description to parse the data in the file to be pushed from the file data segment, and save the parsed data to the local storage device.

2 is a schematic diagram of a receiving process of a conventional digital television receiving terminal, where the process includes: Step 201: Request a Program Association Table (PAT, Program Association Table) and a Service Descriptor Table (SDT), and at the same time in the PAT callback. Request a Program Map Table (PMT, Program Map Table) to perform SDT processing in the SDT callback.

Step 202: Request the searched PVOD service.

Step 203: Receive description data in the description file, and update the local storage device according to the parsing result of the description data in the description file.

In this step, the digital television receiving terminal must first receive the description data in the description file after receiving the data pushed by the server, and then start receiving the content data in the content file. The digital television receiving terminal determines, according to the file type identifier in the segment description of the received PES packet, whether the currently received PES data packet carries the description data in the description file.

The pvod_stb directory exists in the local storage device of the digital TV receiving terminal. The saved description file name is files.dsc and the storage path is /pvod_stb/files.dsc. The description file is saved when the server sends a round of push. For the description file, the normal flow of the PES packet receiving the current bearer description data in this step is as follows:

1, files.dsc changed its name to files_old.dsc;

2. According to the description file name in the fragment description of the PES packet, create a description file with a storage path of /pvod_stb/files.dsc, and store the description data carried in the file data segment into the description file;

3. Compare files.dsc and files_old.dsc and delete the saved content files in the pvod_stb directory according to the following rules:

a) files_old.dsc have content files that are not described in files.dsc;

b) files.dsc and files_old.dsc have content files that are described, but whose size or creation time is different;

4. Traverse all the content files in the pvod_stb directory, delete the following two content files: a) Content files not described in files.dsc, but the file extensions with .dwn and .sta are specially processed, where. Dwn is the file extension of the content file that has not been pushed, .sta is not Reason, avoid deleting the downloaded half of the content file, and a.ts.sta should be treated as a.ts, to avoid deleting the downloaded half of the state file;

b) files.dsc has a description, but the size or create a content file whose modification time is different from the description of files.dsc;

5. According to the description of files.dsc, the content files in the files.dsc are described in advance and the size exceeds the preset threshold, but the digital TV receiving terminal does not exist in the local storage device. The specific requirements are as follows:

a) Create an empty file with the file name of the content file according to the description in files.dsc and assign the size. When creating, add the extension .dwn and create the corresponding state file with the file extension .sta. To describe the status of the push;

b) Set the empty file creation modification time to the "start time" described in files.dsc.

The purpose of pre-creating an empty file in this step is to prevent the digital television receiving terminal from spending too much time on the creation of a large file when receiving a content file that is not available in the local storage device, thereby affecting the receiving speed, or even storing the content file;

6, delete files_old.dsc;

7. Record the version in files.dsc, the total number of content files, and the number of content files that have been pushed, ie, the number of content files consistent with the description in files.dsc when the traversal is performed in step 4.

If you find that there are both file.dsc and files_old.dsc in the local storage device when performing step 1 above, it means that there is an error before the fifth step in the previous round of push, such as power off. The received description file is saved as file.dsc, and then executed from step 3. If you find that there is files_old.dsc in the local storage device when performing step 1 above, save the currently received description file as file.dsc. Then start from step 3.

If the description data in the description file of the current round is divided into several PES data packet pushes, and the digital television receiving terminal finds that the version number is different from the previously received PES data packet when receiving one of the PES data packets, it is required The received PES packet is deleted and re-received from the PES packet containing the new version number. If the steps of the file in the description file are found during the execution of steps 3 and 4 above, the process can be directly ended.

Step 204: Receive content data in the content file and save it. For the above-mentioned process, reference may be made to the patent application entitled "A method and system for pushing video and data content to implement the local broadcast", and details are not described herein again.

It can be seen from the above that the existing method for obtaining PVOD, the digital television receiving terminal compares the description file advertised by the server with the locally saved description file, and decides to receive and update the local content according to the difference between the two, that is, comparing The currently saved description file and the saved description file in the local storage device, delete the content file that exists in the saved description file but the description file does not exist in the currently saved description file, and delete the saved description file and save the current one. A content file with descriptions, but describing the size or creating inconsistent modification time, exists in the description file.

However, in the method for obtaining the PVOD service, the server determines the download and update of the content of the digital television receiving terminal, and the digital television receiving terminal can only passively receive. The user cannot select the PVOD file for downloading through the digital TV receiving terminal, so that the user has less selectivity for the PVOD service content, which makes the PVOD service less flexible and cannot meet the personalized needs of the user. Meanwhile, the digital TV receiving terminal compares the description file. The stored PVOD file is updated so that some PVOD files that the user likes are updated, and the user cannot collect and manage the PVOD file after downloading, for example, collecting his favorite PVOD file for playback.

Summary of the invention

In view of this, the main purpose of the embodiments of the present invention is to provide a method for pushing downloaded content of a video on demand service, improving flexibility of pushing a video on demand service, and satisfying a personalized requirement of a user.

Another object of the embodiments of the present invention is to provide a system for pushing download content of a video on demand service, which improves the flexibility of pushing a video on demand service and satisfies the individual needs of the user.

To achieve the above objective, an embodiment of the present invention provides a method for pushing a download content of a video on demand service, where the method includes:

The server carries the description information of the file to be pushed in the push video on-demand control webpage file, and the data in the file to be pushed is carried in the file data segment, and the description information of the file to be pushed is carried in the fragment description, and the package is encapsulated. One or more packet basic stream packets;

The server side uses the packet basic stream data packet to form a transport stream and modulates the output, and the digital television receiving terminal demodulates the received transport stream;

The digital television receiving terminal determines to push the video on demand control webpage file according to the type of service included in the demodulated transport stream; If the digital television receiving terminal stores the push video on demand control webpage file, and determines that the received push video on demand control webpage file and the stored push video on demand control webpage file are inconsistent, storing the received push video on demand control webpage file; if the digital television receives The terminal does not store the push video on demand control webpage file, and stores the received push video on demand control webpage file;

The digital television receiving terminal displays the stored push video on demand control webpage file;

Selecting a push video on demand file to be downloaded by pushing the video on demand control webpage file; the digital television receiving terminal locally generates a download file list including the description information of the push video on demand file according to the pushed video on demand file to be downloaded;

The digital television receiving terminal matches the description information of the description file in the pushed transport stream according to the description information included in the downloaded file list, and saves the content data of the content file in the transport stream corresponding to the matched description information.

Preferably, the description information of the file to be pushed includes a file name and a file type identifier; the method further includes:

When the file to be pushed is a description file, the description file is created in the local storage device by using the file name, and the parsed data is stored in the created description file;

When the file to be pushed is a content file, the content file is created in the local storage device using the file name, and the parsed data is stored in the created content file.

Preferably, the step of selecting a push video on-demand file to be downloaded by pushing the video on-demand control webpage file further comprises: setting a download mode by pushing the video on-demand control webpage file.

Preferably, the downloading method comprises any one or more of the following downloading methods: manual downloading, stopping downloading, standby scheduled downloading, and deleting the downloading task.

Preferably, the step of setting the download mode further includes: setting a push video on-demand file storage path selected by the user;

The method further includes:

When receiving the pushed push video on demand file, the digital television receiving terminal stores the received push video on demand file according to the storage path selected by the user.

Optionally, the step of displaying the push video on demand control webpage file to the user specifically includes: displaying the stored push video on demand control webpage file to the user; or

After receiving the instruction of the user to send the browsing control webpage, reading the stored control webpage file, and using User display.

Preferably, the method further includes: the digital television receiving terminal updating the stored content file in the storage device according to the parsed data; the updating process includes:

Compare the currently stored description file with the stored description file in the local storage device, delete the content file that exists in the stored description file but does not exist in the currently stored description file, and delete the stored description file and current A content file having a description, but describing the size or creating a modification time inconsistency in the stored description file;

Traverse the content file stored in the storage device, delete the content file that does not exist in the currently stored description file, and delete the description in the currently stored description file, but the size or creation modification time is inconsistent with the description in the currently stored description file. Content file.

An embodiment of the present invention further provides a system for pushing downloaded content of a video on demand service, where the system includes: a server end device and a digital television receiving terminal device;

The server device is configured to carry the description information of the file to be pushed in the push video on-demand control webpage file, and the data in the file to be pushed is carried in the file data segment, and the description of the file to be pushed is described. The information is carried in the segment description, encapsulated into more than one packet basic stream data packet, and the packet basic stream data packet is used to form a transport stream to modulate the output;

The digital television receiving terminal is configured to receive the transport stream for demodulation, obtain a push video on-demand control webpage file according to a service type included in the demodulated transport stream, and if the push video on-demand control webpage file is stored, determine the received The push video on demand control webpage file and the stored push video on demand control webpage file are inconsistent, and the received push video on demand control webpage file is stored; if the push video on demand control webpage file is not stored, the received push video on demand control webpage file is stored; display storage Pushing the video on demand control webpage file; selecting the push video on demand file to be downloaded by pushing the video on demand control webpage file; locally generating a download file list containing the description information of the selected download push video on demand file according to the above selection; The description information included in the list matches the description information of the description file in the pushed transport stream, and saves the content data of the content file in the transport stream corresponding to the matched description information.

Preferably, the server device includes: a push video on demand control webpage file processing module, a description file processing module, a content file processing module, and an output module;

The push video on demand control webpage file processing module is configured to traverse all content file generation networks. The page format push video on-demand control webpage file, and the description information of the to-be-pushed file is carried in the push video on-demand control webpage file, and encapsulates the component group basic stream data packet;

The description file processing module is configured to: traverse all the content files to generate a description file, carry the data in the description file in the file data segment, and carry the description information of the description file in the segment description, and encapsulate the More than one packet elementary stream packet;

The content file processing module is configured to carry data in the content file in a file data segment, and store the description information of the content file in a segment description, and encapsulate the data into one or more packet basic stream data packets;

The output module is configured to form a packetized elementary stream data packet encapsulated by the push video on demand control webpage file processing module, a packet elementary stream data packet encapsulated by the description file processing module, and a packet elementary stream data packet encapsulated by the content file processing module to form a transport stream. Post modulated output.

Preferably, the digital television receiving terminal comprises: a receiving module, a parsing module, a display module, a download file list generating module and an updating module;

The receiving module is configured to receive the transport stream for demodulation;

The parsing module is configured to: when the to-be-pushed file is a push video on-demand control webpage file, if the received push video on-demand control network file and the stored push video on demand control webpage file stored by the storage module are inconsistent, or are not stored, Outputting the received push video on demand control webpage file to the display module; when the to-be-pushed file is a description file, parsing out the data in the description file from the file data segment by using the segment description, in the storage module Establishing a description file, storing the parsed data of the corresponding download file list into the created description file; and when the to-be-pushed file is a content file, parsing the content file from the file data segment by using the segment description After the data is matched with the download file list generated by the download file list generating module, the matched content file is created in the storage module, and the parsed data is stored in the created content file;

The display module is configured to receive a push video on-demand control webpage file, display the webpage manner, obtain information of the push video on demand file selected by the user, and output the information to the download file list generation module; and the download file list generation module is configured to The information output by the display module generates a list of downloaded files containing the description information;

The update module is configured to compare the currently stored description file and the description file stored in the storage module, and delete the description in the stored description file, but the description file currently stored in the description file does not exist. The content file, and delete the content file in the stored description file and the currently stored description file, but the description file size or the modification time is inconsistent; traverse the stored content file in the storage module, delete the currently stored description The content file described in the file does not exist, and the content file in which the description exists in the currently stored description file but the size or the modification time is inconsistent with the description in the currently stored description file is deleted; the storage module is deleted after the comparison and traversal are performed. The description file already stored in .

The method and system for pushing the downloaded content of the video on demand service are as shown in the foregoing technical solution. The server side carries the description information of the file to be pushed in the PVOD control webpage file, and carries the data in the file to be pushed. In the file data segment, the description information of the file to be pushed is carried in the segment description, and is encapsulated into one or more packet basic stream data packets; the server end uses the packet elementary stream data packet to form a transport stream and modulates the output; the digital television receiving terminal Demodulating the received transport stream; the digital television receiving terminal determines to be a PVOD control webpage file according to the type of service included in the demodulated transport stream; and if the digital television receiving terminal stores the PVOD control webpage file, determining the received PVOD control webpage file Inconsistent with the stored PVOD control webpage file, storing the received PVOD control webpage file; if the digital television receiving terminal does not store the PVOD control webpage file, storing the received PVOD control webpage file; displaying the stored PVOD control webpage file to the user;The PVOD controls the webpage file, selects the downloaded PVOD file according to its own needs, and sets the download mode; the digital television receiving terminal locally generates a download file list containing the description information of the selected downloaded PVOD file according to the user's selection; the digital television receiving terminal according to the download The description information included in the file list matches the description information of the description file in the pushed transport stream, and saves the content data of the content file in the transport stream corresponding to the matched description information. In this way, the PVOD control webpage file is generated by the server, and the digital television receiving terminal can select the PVOD file that needs to be downloaded according to the PVOD control webpage file, thereby enhancing the user's usability and improving the flexibility of pushing the video on demand service. Further, when the user selects the PVOD file to be downloaded, the user can set the download to facilitate the collection and file content management of the downloaded PVOD file, and meet the personalized needs of the user.

DRAWINGS

FIG. 1 is a schematic flowchart of a method for acquiring a PVOD service.

2 is a schematic diagram of a receiving process of a conventional digital television receiving terminal. FIG. 3 is a schematic flowchart of a method for pushing download content of a video on demand service according to an embodiment of the present invention.

4 is a schematic diagram of a process for a digital television receiving terminal to acquire a PVOD control webpage file according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a PVOD control webpage file displayed in an embodiment of the present invention.

FIG. 6 is a schematic diagram of a specific process of step 304 in the embodiment shown in FIG.

FIG. 7 is a schematic diagram of a specific process of step 608 in the embodiment shown in FIG. 6.

FIG. 8 is a schematic structural diagram of a system for pushing download content of a video on demand service according to an embodiment of the present invention.

detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail below with reference to the accompanying drawings.

The PVOD service meets the requirements of users to perform video on demand services on demand. If users cannot select the PVOD files they download, they may not be able to meet the personalized needs of users. Moreover, as digital TV services become more and more abundant, value-added services will become more and more The more important the situation, the more personalized and customized the user can be, in order to make the business flexible and rich enough. Users can customize the download of the business when they use it, and can also personalize the downloaded business, selectively store the user's favorite programs and save the program bookmarks, so that they can be played back later, so that they can be unconstrained at any time. Push the video on demand service as needed.

In the embodiment of the present invention, the server sets a PVOD control webpage file for describing the PVOD service selected by the user according to the PVOD service to be advertised, and the system uses a single frequency point, a single packet identifier (PID, Packet Identifier) broadcast, and digital television reception. The terminal receives the PVOD control webpage file and displays it to the user in the form of a webpage. The user selects the required PVOD service from the displayed PVOD control webpage file, and the digital television receiving terminal generates a download file list according to the personalized selection of the user, and the download file list includes Downloading the description information of the file and the data stream information of the associated different PVOD service, and then the digital television receiving terminal selectively receives the PVOD service pushed from the server according to the generated download file list. In this way, by using the PVOD control page, the interaction with the user can be enhanced to meet the personalized needs of the user; and the control page is implemented through the webpage, which is easy to replace and expand; further, the user can view each PVOD in the PVOD control page. The specific introduction of the business and the selection of the corresponding PVOD file according to the need; Moreover, after downloading, the user can manage the file content of the downloaded file, collect the favorite content, and delete the unnecessary content.

FIG. 3 is a schematic flowchart of a method for downloading content for downloading a video on demand service according to an embodiment of the present invention, where the process includes:

Step 301: The server side carries the description information of the file to be pushed in the PVOD control webpage file, and the data in the file to be pushed is carried in the file data segment, and the description information of the file to be pushed is carried in the segment description. Packaged into more than one PES packet.

In the actual application, the payload part in the preset PES packet encapsulation format includes: a PVOD control webpage file, a fragment description, and a file data fragment, and the server side carries the data in the to-be-pushed file in the file data fragment, and the file to be pushed is to be pushed. The description information is carried in the fragment description and encapsulated into more than one PES data packet, and the to-be-pushed file refers to a PVOD file.

In the embodiment of the present invention, the file to be pushed by the server includes the PVOD control webpage file in addition to the foregoing description file and the content file, and the PVOD control webpage file carries the description information of the file to be pushed in the manner of the webpage.

In this embodiment, the server generates the PVOD control webpage file in the webpage format by using the description information in the file to be pushed. The server can pre-set the PVOD control webpage file template, and write the description information of the corresponding file to be pushed according to the format of the set PVOD control webpage file template.

In practical applications, the PVOD control webpage file template can be set as needed. For example, the file to be pushed is classified into a classification column and displayed on the front page of the PVOD control page. Each category column corresponds to a different sub-column, and the sub-column corresponds to a specific sub-column. Push the description of the file. The process of generating a PVOD control webpage according to the description of the file to be pushed by the server, and the description of the file to be pushed is carried in the PVOD control webpage file. For details, refer to related technical documents, and details are not described herein.

The PVOD control webpage file may carry file type identifier and version information that identifies the PVOD control webpage file.

Step 302: The server uses the PES data packet to form a transmission stream and modulates the output, and the digital television receiving terminal demodulates the received transport stream.

In this step, the digital television receiving terminal first receives the PVOD control webpage pushed by the server. The description information in the piece receives the description data in the description file, and finally receives the content data in the content file pushed by the server.

Step 303: The digital television receiving terminal determines to be a PVOD control webpage file according to a service type (Service Type) included in the demodulated transport stream.

In this step, the digital television receiving terminal determines whether the received transport stream is a PVOD control webpage file according to the type of service included in the demodulated transport stream.

Step 304: If the digital TV receiving terminal stores the PVOD control webpage file, determine that the received PVOD control webpage file is inconsistent with the locally stored PVOD control webpage file, and store the received PVOD control webpage file; if the digital television receiving terminal does not store the PVOD control The web page file stores the received PVOD control web page file.

In this step, it is determined whether the received PVOD control webpage file and the stored PVOD control webpage file are consistent according to the included version number and the comparison description file. For details, refer to the related technical documents.

Step 305: Display the stored PVOD control webpage file to the user.

Step 306: The user views the PVOD control webpage file, and selects the download according to the needs of the user.

PVOD file and set the download method.

Step 307: The digital television receiving terminal locally generates a download file list including the description information of the selected downloaded PVOD file according to the user's selection.

Step 308: The digital television receiving terminal matches the description information of the description file in the pushed transport stream according to the description information included in the downloaded file list, and saves the content data of the content file in the transport stream corresponding to the matched description information.

In this embodiment, the digital television receiving terminal acquires the PVOD control webpage file, and the user selects the downloaded PVOD file from the PVOD control webpage file according to the needs of the user, and the digital television receiving terminal generates a download file list according to the user's selection, and pushes the list from the server. The data in the to-be-pushed file in the list of downloaded files is parsed in the transport stream containing the file to be pushed, and the parsed data is saved to the local storage device.

The server carries the data in the file to be pushed in the file data segment, and carries the description information of the file to be pushed in the segment description to form a transport stream and modulates the output. The steps are as follows: a. Presetting the payload portion of the PES packet encapsulation format includes: fragment description and file data fragment.

The server side carries the data in the file to be pushed in the file data segment, and the description information of the file to be pushed is carried in the segment description, and is encapsulated into one or more PES data packets.

There are two types of files to be pushed on the server side: description files and content files. The content file includes content data corresponding to the video and the data content, and the description file includes description information describing the overview of all the content files on the server side.

c The server uses the PES packet to form the transport stream and modulate the output.

The transport stream that pushes the PVOD control web page file and the transport stream that pushes the file to be pushed are identified using different service types.

So far, the method flow for pushing the downloaded content of the video on demand service in the embodiment of the present invention is completed.

4 is a schematic diagram of a process for a digital television receiving terminal to acquire a PVOD control webpage file according to an embodiment of the present invention, where the process includes:

Step 401: Start a PVOD service.

In this step, when the user starts the PVOD service through the digital television receiving terminal, at least one PVOD service search process needs to be initiated.

The PVOD service description describes the entry frequency parameter, the PVOD service type, and the PVOD service name of the PVOD service in the Network Information Table (NIT) of the primary frequency point. The PVOD service has only one entry in the EPG system. The service information/program specific information (SI/PSI, Service Information/Program Specific Information) is described.

Step 402: Search for the PVOD service channel information by using the frequency search frequency of the channel search, and then search for the PMT by the PVOD service channel frequency lock frequency to obtain the PID.

In this step, the NIT is obtained by searching, the main frequency point of the channel search is obtained from the NIT, the PAT is searched in the service flow of the main frequency point, and the PMT of the program is parsed to obtain all the PIDs in the service flow. That is to say, the digital television receiving terminal searches for the PVOD frequency point by requesting PAT and SDT, simultaneously requesting the PMT in the PAT callback, and performing SDT processing in the SDT callback.

The specific process of this step includes: a, search for and obtain NIT;

In this step, the general operator provides a primary frequency point at which the NIT containing the entire network information is transmitted, and the digital television receiving terminal acquires the NIT by automatically searching for a certain frequency point or manually designating a specific frequency point.

After obtaining the NIT, the physical information of all the flows of the network can be obtained, for example, the main frequency information of each operator, the modulation mode, the symbol rate, and the characteristics of the network itself.

b, querying the PVOD service frequency information of the requested service type from the obtained NIT; c, searching for the PAT in the service flow of the primary frequency point according to the PVOD service frequency obtained by the query, parsing the PMT to obtain the PMT of the program, and SDT of PVOD business;

d, record the PID of the PVOD service data stream.

The foregoing process is a prior art, and a more detailed description can be found in related technical documents, and details are not described herein again. Step 403: Query whether the PVOD service corresponding to the PID is updated. If yes, search for the PVOD control webpage file, start the PVOD download update, and obtain the PVOD control webpage.

In this step, the process of querying the PVOD service corresponding to the PID is updated. For details, refer to the patent application with the application number "200910176202.0" and the invention name "a method and system for pushing video and data content to achieve local location". This will not be repeated here.

The process of PVOD download update is as follows:

a, STB lock frequency;

b, request PVOD business data;

In this step, the PID of the PVOD service data flow is requested.

c, download the PVOD fragment description file;

d. Download the PVOD control web page file according to the PVOD fragment description file.

In this step, the server side generates a PVOD control webpage file in advance and pushes it to the digital television receiving terminal.

Step 404: Select a PVOD file required by the user according to the obtained PVOD control webpage file. In this step, after the STB downloads the PVOD control webpage file, the browser starts the PVOD control webpage file, and performs viewing, selection, and the like according to the needs of the user. The STB generates a corresponding list of downloaded files based on the user's selection.

FIG. 5 is a schematic diagram of a PVOD control webpage file displayed in an embodiment of the present invention. The PVOD The control webpage files include three sections: popular theater, music KTV, and science and technology education. Each of the columns includes: "Status" and "Detail" buttons. Of course, in practical applications, the PVOD control webpage file can also be displayed in multiple pages, and each page displays different columns. The user operates the PVOD control webpage file according to his own needs.

The process of the user operating the PVOD control webpage file according to their own needs is as follows: a. View the detailed content of each column in each PVOD control webpage file. When the user clicks the "detail" button, the detailed content of each column is opened, and then the content is selected. Part or all of the content;

In this step, for example, the user queries the movie information by clicking the "detail" button in the popular theater, selects the desired movie program, and the digital television receiving terminal automatically generates a list of downloaded files according to the user's selection.

b, set the download mode;

In this step, the download method includes any one or more of the following download methods: manual download, stop download, standby scheduled download, and delete download task.

After browsing and selecting different content in the PVOD control webpage file, the digital television receiving terminal automatically generates a download file list locally, and the download file list records the description information of the PVOD file to be downloaded: frequency point information, data stream information, and Control which files need to be downloaded during the download process.

The user clicks the "Status" button to view the download status of the PVOD file recorded in the above list of downloaded files and the download method of the selected file. If the standby reservation download is selected, when the user performs the standby operation, the digital television receiving terminal automatically enters the download process, starts the service and downloads, and after the download is completed, the digital television receiving terminal enters the true standby state. If the user selects manual download, the digital television receiving terminal enters the download process according to the user's settings, starts the service, and downloads.

The download process is as follows:

Al. Read the list of downloaded files;

Bl. Lock the frequency and request the data stream PID;

Cl. Receive a fragment description file;

Dl. Compare the fragment description file and perform preprocessing;

In this step, the pre-processing of the description file belongs to the prior art, and details are not described herein again.

El. Download the PVOD file, compare the fragment description file and the list of downloaded files; Fl. Determine whether the downloaded PVOD file is the PVOD file selected for download, if yes, execute step gl, otherwise, return to the execution step el;

Gl. Download the PVOD file.

c, check the download progress;

In this step, if there are multiple PVOD files to be downloaded, the status bar in the PVOD control web page file displays the progress information of each PVOD file download.

d, delete the download.

In this step, delete the download list and delete the content.

FIG. 6 is a schematic flowchart of a process in step 304 of the embodiment of the present invention. The process includes: Step 601: The digital television receiving terminal determines, according to the type of service included in the demodulated transport stream,

PVOD controls web page files.

In this step, the PVOD control webpage file, the description file, and the content file use different service types, and the digital television receiving terminal can determine whether the received PVOD control webpage file or the description file or the content file is received according to the parsed service type.

Step 602: The digital television receiving terminal queries whether a PVOD control webpage file is stored. If yes, step 603 is performed. Otherwise, step 604 is performed.

Step 603: Determine whether the received PVOD control webpage file and the stored PVOD control webpage file are consistent. If yes, the process ends. Otherwise, step 604 is performed.

In an actual application, after determining that the received PVOD control webpage file and the stored PVOD control webpage file are inconsistent, the information in the received PVOD control webpage file and the stored PVOD control webpage file may be further extracted, and the extracted information may be extracted. The information forms a second PVOD control web page file for storage and display to the user.

Step 604: Store the received PVOD control webpage file.

In this step, if the PVOD control webpage file or the PVOD control webpage file and the second PVOD control webpage file are pre-stored, the second PVOD control webpage file is stored in the PVOD control webpage file to be received in step 603. If the inconsistency information in the PVOD control webpage file is extracted, the currently received PVOD control webpage file and the currently regenerated second PVOD control webpage file are respectively updated; otherwise, the PVOD control webpage file pushed by the server is stored. . Step 605: Display a PVOD control webpage file to the user.

In this step, after storing the received PVOD control webpage file, the digital television receiving terminal may display the stored PVOD control webpage file or the second PVOD control webpage file to the user according to a preset policy; or may receive After the user sends an instruction to browse the control webpage, the stored control webpage is read, and the PVOD control webpage or the second PVOD control webpage is displayed to the user.

Step 606: The user selects a PVOD file to be downloaded according to the displayed PVOD control webpage file, and the digital television receiving terminal generates a download file list according to the user's selection.

In this step, the user browses the displayed PVOD control webpage, selects the corresponding PVOD file in the corresponding sub-column from the displayed column according to the PVOD file to be downloaded, and sets the download mode, and the digital television receiving terminal selects the PVOD file according to the user and The download mode identifier automatically reads the description information of the PVOD file selected by the user in the PVOD control webpage, and generates a download file list.

Further, in order to facilitate the user to personally manage the selected PVOD file, the user can select the user's favorite program and save the program bookmark to facilitate the playback in the future. In the embodiment of the present invention, when the user sets the download mode, the user may further The PVOD file storage path selected by the user is set, so that when the digital TV receiving terminal receives the pushed PVOD file, the received PVOD file is stored according to the storage path selected by the user, instead of being stored to the default path, which is convenient for the user to personalize the collection. management.

Step 607: The digital television receiving terminal updates the saved description file.

In this step, the process of updating the saved description file by the digital television receiving terminal is similar to the existing step 203. Specifically, the pvod_stb directory exists in the local storage device of the digital television receiving terminal, and the saved description file name in the directory is The files.dsc and the storage path are /pvod_stb/files.dsc. The description file is a description file saved by the user on the digital TV receiving terminal. The process of updating the saved description file in this step is as follows:

1, files.dsc changed its name to files_old.dsc;

2. According to the description file name in the download file list, create a description file with a storage path of /pvod_stb/files.dsc, and store the description information data of the downloaded file list into the description file; 3. Compare files.dsc and files_old.dsc and delete the saved content files in the pvod_stb directory according to the following rules:

a) files_old.dsc have content files that are not described in files.dsc;

4. Traverse all the content files in the pvod_stb directory, delete the following two content files: a) Content files not described in files.dsc, but the file extensions with .dwn and .sta are specially processed, where. Dwn is the file extension of the content file that has not been pushed. The .sta is unreasonable. Avoid deleting the downloaded content file. For example, a.ts.sta should be processed as a.ts to avoid the status of the downloaded part. The file has been deleted;

6, delete files_old.dsc;

7. Record the version in files.dsc, the total number of content files, and the number of content files that have been pushed, that is, the number of content files consistent with the description in files.dsc when the traversal is performed in step 4.

If you find that there are both file.dsc and files_old.dsc in the local storage device when performing step 1 above, it means that there is an error before the fifth step in the previous round of push, such as power off. The received description file is saved as file.dsc, and then executed from step 3. If you find that there is files_old.dsc in the local storage device when performing step 1 above, save the currently received description file as File.dsc, and then start from step 3.

Step 608: The digital television receiving terminal compares the description information of the description file in the received transport stream according to the description information included in the downloaded file list, and saves the content data of the content file in the transport stream corresponding to the matched description information.

Step 609, detecting updates of PAT, PMT, and PVOD.

The detection in this step is well known in the art and will not be described here.

FIG. 7 is a schematic flowchart of a step 608 of the embodiment shown in FIG. 6, including the following steps: Step 701: Receive a PES data packet.

Step 702: Parse the content file name, path, packet sequence number, and content data encapsulated in the PES packet.

Step 703: Determine whether the local storage device has the same content file as the content file name. If yes, go to step 704. Otherwise, go to step 708.

Step 704: Read a status file corresponding to the content file.

Step 705: Determine whether the PES packet has been downloaded by using the record in the status file. If yes, the process ends. Otherwise, step 706 is performed.

Step 706: Store the content data in the PES packet into the file.

Step 707, updating the content recorded in the status file, and ending the process.

In this step, if the entire content data of a content file has been received by the digital television receiving terminal, the status file is deleted. To determine whether all the content data of a content file has been completely received, it is determined by the current packet serial number and the last packet serial number carried in the file data segment.

Step 708, create a content file, allocate a file space, and create a corresponding state file, and return to step 706.

In the actual service, the user can also browse the downloaded PVOD file in the PVOD control webpage, open the media file by calling JS (javascript), and use the media player to play the media file.

FIG. 8 is a schematic structural diagram of a system for selectively downloading content in a video-on-demand application according to an embodiment of the present invention. The system 800 includes: a server device and a digital television receiving terminal device, where: the server device is configured to carry the description information of the file to be pushed on the PVOD control webpage The data in the file to be pushed is carried in the file data segment, and the description information of the file to be pushed is carried in the segment description, encapsulated into more than one PES packet, and the PES packet is used to form a transport stream and modulated. Output

The digital television receiving terminal is configured to receive the transport stream for demodulation, obtain a PVOD control webpage file according to the service type included in the demodulated transport stream, and if the PVOD control webpage file is already stored, determine the received PVOD control webpage file and the stored PVOD. Control the webpage file inconsistency, store the received PVOD control webpage file; store the received PVOD control webpage file if the PVOD control webpage file is not stored; display the stored PVOD control webpage file; select the PVOD file to be downloaded through the PVOD control webpage file And generating a list of download files including the description information of the selected downloaded PVOD file locally according to the above selection; matching the description information of the description file in the pushed transport stream according to the description information included in the downloaded file list, and saving the transmission corresponding to the matching description information The content data of the content file in the stream.

In this embodiment, the digital television receiving terminal receives the transport stream for demodulation. If the segment description is used, the segment description is used to parse the data corresponding to the downloaded file list in the file to be pushed from the file data segment, and the parsed data is saved to the local storage. device.

The server device includes: a PVOD control webpage file processing module, a description file processing module, a content file processing module, and an output module, where:

The PVOD control webpage file processing module is configured to traverse the PVOD control webpage file of the webpage format generated by all the content files, and the description information of the to-be-pushed file is carried in the PVOD control webpage file, and is encapsulated into a PES data packet;

a description file processing module, configured to traverse all the content files to generate a description file, and the data in the description file is carried in the file data segment, and the description information of the description file is carried in the segment description, and is encapsulated into one or more PES data packets;

a content file processing module, configured to carry data in the content file in the file data segment, and carry the description information of the content file in the segment description, and encapsulate the information into one or more PES data packets; and output a module, where the PVOD control webpage is used The PES packet encapsulated by the file processing module, the PES packet encapsulated by the description file processing module, and the PES packet encapsulated by the content file processing module constitute a modulated output of the transport stream.

The digital television receiving terminal comprises: a receiving module, a parsing module, a display module, and a download file list. Generate modules, storage modules, and update modules, where:

a receiving module, configured to receive a transport stream for demodulation;

The parsing module is configured to: when the file to be pushed is a PVOD control webpage file, if the received PVOD control webpage file and the PVOD control webpage file stored by the storage module are inconsistent or not stored, the received PVOD control webpage file is output to the When the file to be pushed is a description file, the data in the description file is parsed from the file data segment by using the segment description, and matched with the downloaded file list generated by the downloaded file list generating module, in the storage module. The matching description file is created, and the parsed data of the corresponding download file list is stored in the created description file; when the file to be pushed is the content file, the fragment description is used to parse the data in the content file from the file data segment, and After the downloaded file list generated by the download file list generating module is matched, the matched content file is created in the storage module, and the parsed data is stored in the created content file;

a display module, configured to receive a PVOD control webpage file, display the webpage to the user, obtain information of the PVOD file selected by the user, and output the information to the download file list generation module;

a download file list generating module, configured to generate a download file list including description information according to the information output by the display module;

And an update module, configured to compare the currently stored description file and the stored description file in the storage module, delete the content file that exists in the stored description file but does not exist in the currently stored description file, and delete the stored file The content file in the description file and the currently stored description file are described, but the description size or the modification time is inconsistent; the content file stored in the storage module is traversed, and the description of the currently stored description file does not exist. a content file, and deleting a content file in the description file currently stored, but the size or creation modification time is inconsistent with the description in the currently stored description file; deleting the stored storage module after performing the comparison and traversing Description file.

In practical applications, the storage module may be a hard disk built in a digital television receiver, or may be an external hard disk.

The above description is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A method for pushing downloaded content of a video on demand service, the method comprising:

The server side uses the packet elementary stream data packet to form a transport stream and modulates the output;

The digital television receiving terminal demodulates the received transport stream;

The digital television receiving terminal acquires the push video on demand control webpage file according to the service type included in the demodulated transport stream;

If the digital television receiving terminal stores the push video on demand control webpage file, and determines that the received push video on demand control webpage file and the stored push video on demand control webpage file are inconsistent, storing the received push video on demand control webpage file; if the digital television receives The terminal does not store the push video on demand control webpage file, and stores the received push video on demand control webpage file;

The method according to claim 1, wherein the description information of the file to be pushed includes a file name and a file type identifier; the method further includes:

The method according to claim 2, wherein the step of controlling a webpage file by pushing a video on demand to select a push video on demand file to be downloaded further comprises: pushing a video point by Broadcast control web file, set the download method.

4. The method according to claim 3, wherein the downloading method comprises any one or more of the following downloading methods: manual downloading, stopping downloading, standby scheduled downloading, and deleting the downloading task.

The method of claim 4, wherein the step of setting the download mode further comprises: setting a push video on demand file storage path selected by the user;

The method further includes: when receiving the pushed push video on demand file, the digital television receiving terminal stores the received push video on demand file according to the storage path selected by the user.

The method according to claim 1, wherein the displaying the push video on-demand control webpage file to the user comprises:

Displaying the stored push video on demand control webpage file to the user; or,

After receiving the instruction of the user to send the browsing control webpage, the stored control webpage file is read and displayed to the user.

The method of claim 2, wherein the method further comprises: the digital television receiving terminal updating the stored content file in the storage device according to the parsed data; the updating process comprises:

8. A system for pushing downloaded content of a video on demand service, the system comprising: a server device and a digital television receiving terminal;

The digital television receiving terminal is configured to receive the transport stream for demodulation, according to the demodulated transmission The service type of the stream obtains the push video on demand control webpage file. If the push video on demand control webpage file is stored, it is determined that the received push video on demand control webpage file and the stored push video on demand control webpage file are inconsistent, and the received push video on demand is stored. Controlling the webpage file; if the push video on demand control webpage file is not stored, storing the received push video on demand control webpage file; displaying the stored push video on demand control webpage file; selecting the push video on demand by downloading the video on demand control webpage file a file; generating a list of download files including description information of the selected download push video on demand file locally according to the above selection; matching the description information of the description file in the pushed transport stream according to the description information included in the downloaded file list, and saving the matching description information The content data of the content file in the corresponding transport stream.

9. The system according to claim 8, wherein the server device comprises: a push video on demand control webpage file processing module, a description file processing module, a content file processing module, and an output module;

The push video on demand control webpage file processing module is configured to traverse all content files to generate a push video on demand control webpage file in a webpage format, and carry the description information of the to-be-pushed file in a push video on-demand control webpage file, and encapsulate the component group elementary stream. data pack;

The system of claim 8 or 9, wherein the digital television receiving terminal comprises: a receiving module, a parsing module, a display module, a download file list generating module, a storage module, and an updating module;

The parsing module is configured to: when the file to be pushed is a push video on demand control webpage file, If the received push video on demand control network file and the stored push video on demand control webpage file of the storage module are inconsistent or not stored, the received push video on demand control webpage file is output to the display module; when the file to be pushed is to be pushed When the file is described, the data in the description file is parsed from the file data segment by using the segment description, a description file is created in the storage module, and the parsed data of the corresponding downloaded file list is stored in the created description file. When the file to be pushed is a content file, the data in the content file is parsed from the file data segment by using the segment description, and matched with the downloaded file list generated by the downloaded file list generating module, and then established in the storage module. The matched content file, and the parsed data is stored in the created content file;

The update module is configured to compare the currently stored description file and the stored description file in the storage module, delete the content file that exists in the stored description file but does not exist in the currently stored description file, and delete the stored content file. The content file in the description file and the currently stored description file are described, but the description size or the modification time is inconsistent; the content file stored in the storage module is traversed, and the content file that does not exist in the currently stored description file is deleted. And deleting the content file in the currently stored description file, but the size or the creation modification time is inconsistent with the description in the currently stored description file; and deleting the stored description file in the storage module after performing the comparison and traversing.