CN103269450B - A kind of multimedia system towards Android intelligent television - Google Patents

Abstract

The invention relates to a multimedia system for Android smart TVs, comprising: a digital TV service module, used to obtain and store program information related to digital TV broadcast streams; a TV operating system media player module, used to serve The module acquires the program information of the digital TV broadcast stream corresponding to the media resource locator imported by the NGB-H/J application, and reconstructs the media resource locator according to the program information; the digital TV playback module uses The method is to decapsulate the data structure of the reconstructed locator, and play the digital TV broadcast stream according to the decapsulated data. The present invention integrates the playing function of digital TV broadcasting into the Android multimedia system, so as to achieve the unified call of the upper layer application and the unified management of various media playing by the Android framework layer, and can perform a lot of media functions in the next generation broadcasting TV specification good support.

Description

A multimedia system for Android smart TV

technical field

The invention relates to the field of Android smart TVs, in particular to a multimedia system for Android smart TVs.

Background technique

With the development of smart operating systems in mobile terminals, the TV industry has also begun to transform from traditional middleware technology to smart TV operating systems. At the same time, as an open source smart terminal operating system, the Android system is gaining more and more popularity due to its open source and ease of use. The Android system is supported by a large number of third-party applications. With the Android system as the basis of the smart TV system, it can provide a large number of third-party applications for smart TV users.

At present, the multimedia system of Android supports the playback and control of local files and streaming media files, etc., but does not support the playback of digital TV broadcast streams. The current traditional approach is to make the playback function of the digital TV broadcast stream into the form of a local dynamic library, and then the upper layer calls it through JNI, encapsulates it in the java layer, and finally presents it in the form of an Android application. This approach does not integrate the playback function of digital TV broadcast streams into the Android multimedia framework, which is not conducive to the unified use of local media, streaming media, and digital TV broadcast stream playback functions by upper-layer applications, and is also not conducive to the Android framework’s ability to use various Unified management of various media playback functions.

Based on this, the problem that needs to be solved urgently at this stage is to allow Android to support the digital TV broadcast stream playback function, and at the same time integrate the digital TV broadcast stream playback function into the Android multimedia system, so as to achieve the unified call of the upper application and the Android framework layer. Unified management of various media playback.

Contents of the invention

The purpose of the present invention is to provide a multimedia system for Android smart TVs that can overcome the above-mentioned defects.

In a first aspect, the present invention provides a multimedia system for Android smart TVs, including a TV operating system media player module, a digital TV service module, and a digital TV player module, wherein: the digital TV service module is used to acquire and Store program information related to the digital TV broadcast stream; the media player module of the TV operating system is used to obtain from the digital TV service module the digital TV broadcast corresponding to the media resource locator imported by the NGB-H/J application stream program information, and reconstruct the media resource locator according to the program information; the digital TV playback module is used to decapsulate the reconstructed locator data structure, and Plays a digital TV broadcast stream.

Preferably, the TV operating system media player module is configured to: convert the media resource locator passed in by the NGB-H/J application from hexadecimal to decimal; The digital TV service module acquires program information corresponding to the media resource locator; and reconstructs the media resource locator according to the program information.

Preferably, the system also includes an Android media player client, an Android media player server and an Android media player module, wherein the TV operating system media player module is also configured to: judge the media resource locator ; If the media resource locator belongs to the broadcasting service of the digital TV broadcast stream, then obtain the program information; if the media resource locator does not belong to the broadcasting service of the digital TV broadcast stream, then locate the media resource The character is passed to the Android media player client, and passed to the Android media player server from the Android media player client through the binder communication mechanism of Android, and passed to the Android media player module; the Android media player module is based on the The above media resource locator is used to play the broadcasting services that do not belong to the digital TV broadcasting stream.

Preferably, the digital TV service module is also used to store a plurality of items related to a plurality of program information, each item includes an original network ID, a transport stream ID and a service ID, and the media player module of the TV operating system passes the comparing the original network ID, transport stream ID and service ID in the media resource locator with the multiple items, and obtaining the program information related to the media resource locator according to the comparison result.

Preferably, the TV operating system media playing module reconstructs the media resource locator by encapsulating the program information and the type of the uniform resource locator url.

Preferably, the audio codec type, video codec type, audio PID and video PID in the program information are set in the Android built-in data type KeyVector, and the type of the uniform resource locator url is digital video broadcasting.

Preferably, the media player module of the TV operating system, the Android media player client and the Android media player server respectively have one or more corresponding extension interfaces conforming to the NGB-H/J standard.

Preferably, the media playing module of the TV operating system inquires the current tunerID from the digital TV service module, and performs a frequency locking operation through the tunerID, the original network ID and the transport stream ID.

Preferably, the system further includes: an interface conforming to the NGB-H/J specification of the next generation broadcasting network, for transferring the media resource locator of the NGB-H/J application to the media playing module of the TV operating system.

In the second aspect, the present invention provides an Android smart TV, which includes the Android smart TV-oriented multimedia system described in the first aspect.

The present invention expands the multimedia system of Android, makes Android support digital TV broadcast stream playing, and integrates the playback function of digital TV broadcast into the Android multimedia system, so as to achieve the unified call of the upper layer application and the playback of various media by the Android framework layer Unified management, and can well support the media functions in the next generation broadcast television specification.

Description of drawings

Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, in the accompanying drawings:

Fig. 1 is the structural block diagram of the multimedia system facing Android Smart TV according to the embodiment of the present invention; And

Fig. 2 is a flowchart of a method for implementing a multimedia system oriented to an Android smart TV according to an embodiment of the present invention.

detailed description

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Fig. 1 is a structural block diagram of a multimedia system oriented to an Android smart TV according to an embodiment of the present invention.

As shown in Figure 1, the multimedia system includes the playback interface of the java layer of Android, the JNI layer of Android, and the NGB-H/J interface conforming to the media interface specification NGB-H/J of Next Generation Broadcasting (NGB) , TV operating system media player module (TvosMediaPlayer), digital TV service module (DTVServer), Android media player client, Android media player server, digital TV player module (DTVPlayer), Android media player module (StagefrightPlayer).

Android applications are generally related to the playback interface of the java layer of Android and the JNI layer of Android, which are well known to those skilled in the art, so they will not be described in detail so as not to obscure the subject of the present invention.

The focus of the present invention will be described below, that is, the processing of NGB-H/J applications.

The application of NGB-H/J is executed through the NBG-H/J interface, and the upper layer application (NGB-H/J application) transmits the media resource locator to TvosMediaPlayer through the NGB-H/J interface. The media resource locator includes original network ID, transport stream ID and service ID.

The DTVServer acquires and analyzes the program information of the digital TV broadcast stream, generally, the program information can be obtained from the tuner module in the set-top box connected to the TV. DTVServer exists in the system in the form of Android local service, and provides other modules in the system with functions such as program information list, channel search and frequency locking of digital TV broadcast streams.

TvosMediaPlayer interacts with DTVServer, obtains the program information of digital TV broadcast stream from DTVServer, and reconstructs the media resource locator imported by NGB-H/J according to the program information. The reconstructed media resource locator is passed to the Android media player client. In addition, TvosMediaPlayer queries the current tunerID from the DTVServer, and performs a frequency locking operation through the tunerID, the original network ID and the transport stream ID. TvosMediaPlayer can shield the details of the Android media framework, and at the same time provide support for NGB-H/J functions.

Through the communication mechanism such as binder in Andriod, the reconstructed media resource locator is passed from the Android media player client to the Android media player server. In addition, one or more corresponding media interfaces need to be extended in TvosMediaPlayer, standard Android media playback server and client to meet the requirements of NGB-H/J for media playback interfaces.

The Andriod media player server judges whether it is a digital TV broadcast stream, if so, calls DVBPlayer to play, and passes the reconstructed media resource locator into DVBPlayer.

DTVPlayer decapsulates the reconstructed media resource locator/parameter data structure, and plays the digital broadcast TV stream according to the parameters obtained through decapsulation.

Fig. 2 is a flowchart of a method for implementing a multimedia system oriented to an Android smart TV according to an embodiment of the present invention.

In step 201, the upper layer application (NGB-H/J application) transmits the resource locator to TvosMediaPlayer through the NGB-H/J interface. For different media types, media resource locators also have different forms. For example, a locator for a local media file has the form file://<host>/<path>. The format of the locator of the streaming media file is: http://<remote host IP>:<remote host port>/<path>. dvb://<original_network_id>.<transport_stream_id>.<service_id>, this is the specific form of the media resource locator of the digital TV broadcast stream.

In step 202, it is judged whether the media resource locator belongs to the playing service of the digital TV broadcast stream according to the difference of the initial protocol mark in the media resource locator. As described in step 201, the character string starting with dvb:// indicates that the media resource locator belongs to the playback service of the digital TV broadcast stream. If the media resource locator belongs to the playing service of the digital TV broadcast stream, the process proceeds to step 203 ; otherwise, the media resource locator does not belong to the playing service of the digital TV broadcast stream, and the process proceeds to step 206 .

In step 203, the media resource locator is reset.

For example, before the reset, the media resource locator of the digital TV broadcast program stream is dvb://888.3.12D, where 888 is the original network ID, 3 is the TS stream ID, and 12D is the service ID. Those skilled in the art should understand that the NGB-H/J specification requires that the above-mentioned ID be in hexadecimal.

In the process of resetting the media resource locator, the above ID needs to be converted from hexadecimal to decimal. For the specific example of the media resource locator mentioned above, the reset is through the conversion from hexadecimal to decimal, and the original network ID is set to 2184, the TS stream ID is set to 3, and the service ID is set to 301, thus obtaining A new resource locator is dvb://2184.3.301.

In step 204, the corresponding program information is acquired according to the new resource locator.

Since the media resource locator belongs to the digital TV broadcast streaming service, it needs to interact with the DTVServer service to obtain program information.

Since the network ID, TS stream ID and service ID correspond to a program, the corresponding program information has been stored in the database when the data stream is imported through the analog TV demodulator. In other words, the program information in the database corresponds to a set of data, namely network ID, TS stream ID and service ID.

Therefore, by comparing the ID group in the reset locator with the ID group in the database, the corresponding program information can be extracted from the database. Program information includes audio language type, audio and video codec type, audio and video PID, etc.

In step 205, the locator is reconstructed according to the program information, and the specific steps are as follows.

The values of audio codec type and video codec type are assigned to parameters audiocodec and videocodec respectively, and the values of audio PID and video PID are assigned to parameters audiopid and videopid respectively.

The Android media player client provides the following interfaces:

status_tsetDataSource(constchar*url,

constKeyedVector<String8,String8>*headers);

Set the parameter url to "dvb://";

KeyVector is a built-in data type of Android, you can set this type of headers by setting it as follows:

<"v_codec", "videocodec">

<"a_codec", "audiocodec">

<"a_pid", "audiopid">

<"v_pid", "video pid">

In this way, the set url and headers are encapsulated in the above data structure.

In step 206, the parameters from step 202 and/or step 205 are passed to the Android media player client. Further, the media player client carries out the following judgment: if it is the parameter imported from step 205, then url and headers are all valid parameters; Just empty.

In step 207, the parameters are passed from the Android media player client to the media player server. Android's media player server and media player client run in two processes, and they communicate through Android's binder communication mechanism. For example, the above parameter transfer from the client to the server can be performed through a binder communication mechanism between the two.

In step 208, the media playing server determines whether it is playing a digital TV broadcast stream.

Whether it is a digital TV broadcast stream can be judged according to the parameters. For example, if the url is dvb://, it belongs to the digital TV broadcast stream. If yes, the flow goes to step 209; otherwise, the flow goes to step 210.

In step 209, the DVBPlayer is invoked to play the digital TV broadcast stream. By decapsulating the data structure encapsulated in step 205, the DVBPlayer player can obtain the audio and video codec type and audio and video PID, thereby calling the interface of the hardware platform to perform the playback operation.

In step 210, the Android built-in player StagefrightPlayer is called to play the local file or streaming media file.

In step 211, playback starts.

Professionals should further realize that the units and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (9)

1. towards a multimedia system for Android intelligent television, comprising:

Digital television service module, for obtaining and relevant program letter is flowed in storage and digital television broadcastingBreath;

TV operation system media play module, for obtain from described digital television service module withIt is corresponding that generation broadcasting and television network media interface specification NGB-H/J applies the media resource finger URL importing intoThe programme information of digital television broadcasting stream, and fixed to described media resource according to described programme informationPosition symbol is reconstructed, and concrete steps comprise:

Next generation broadcasting network media interface specification NGB-H/J is applied to the media resource finger URL importing intoBe converted to 10 systems from 16 systems; Take from described DTV according to the media resource finger URL after conversionBusiness module is obtained the programme information corresponding with described media resource finger URL; And according to described program letterBreath is reconstructed described media resource finger URL;

DTV playing module, carries out data structure decapsulation, root for the finger URL to after reconstructAccording to the data after decapsulation, digital television broadcast stream is play.

2. system according to claim 1, also comprise Android media play client andAndroid media play service end and Android media play module, wherein, described TV operation systemMedia play module is also arranged to:

Described media resource finger URL is judged;

If described media resource finger URL belongs to the play service of digital television broadcasting stream, described in carrying outObtaining of programme information;

If described media resource finger URL does not belong to the play service of digital television broadcasting stream, described in inciting somebody to actionMedia resource finger URL is passed to described Android media play client, and by Android'sBinder communication mechanism passes to Android media play service end from Android media play client,And pass to described Android media play module;

Described Android media play module according to described media resource finger URL to not belonging to DTVThe play service of broadcasting stream is play.

3. system according to claim 1, wherein, described digital television service module is also for depositingStore up the multiple projects relevant to multiple programme informations, each project comprise primitive network ID, MPTS ID andService ID, former by by described media resource finger URL of described TV operation system media play moduleBeginning network ID, MPTS ID and service ID and described multiple project are compared, and obtain according to comparison resultProgramme information that must be relevant to described media resource finger URL.

4. system according to claim 1, wherein, by providing to described programme information with to unifiedThe type of source finger URL url is carried out data encapsulation, and described TV operation system media play module is to describedMedia resource finger URL is reconstructed.

5. system according to claim 4, wherein, the audio coding decoding class in described programme informationType, coding and decoding video type, audio frequency PID and video PID are set to the built-in data class of AndroidIn type KeyVector, the type of described URL url is DVB.

6. system according to claim 1, wherein, described TV operation system media play mouldPiece, described Android media play client and described Android media play service end have respectivelyMeet mutual correspondence one or more of Next generation broadcasting network media interface specification NGB-H/J standardExpansion interface.

7. system according to claim 3, wherein, described TV operation system media play moduleInquire current tunerID from described digital television service module, and by described tunerID,Described primitive network ID and described MPTS ID carry out frequency locking operation.

8. system according to claim 1, also comprises: meet Next generation broadcasting network media and connectThe interface of mouth specification NGB-H/J, for answering Next generation broadcasting network media interface specification NGB-H/JWith media resource finger URL import described TV operation system media play module into.

9. an Android intelligent television, comprise as described in one of claim 1-8 towardsThe multimedia system of Android intelligent television.