CN101383763A - Mobile device signal transfer method and system - Google Patents

Abstract

The present invention provides a mobile terminal signal transfer method and system, the system is used for data processing of streaming media RTP packets and transfer to the output device, including a forwarding device on the mobile terminal side and a receiving device on the output device side , the forwarding device and the receiving device jointly or independently complete the processing of the streaming media data, so that the processed data is suitable for playing on the output device, and the forwarding device is connected with the receiving device through ultra-wideband technology, so that the mobile The data on the terminal side is forwarded to the output device side. The method and system of the invention can provide audio and video services with higher definition and high quality.

Description

Mobile device signal transfer method and system

technical field

The invention relates to the field of mobile phone streaming media, in particular to a method and system for transferring signals of mobile devices.

Background technique

Along with the development of mobile communication technology, more and more mobile phone streaming media services represented by MBMS (Multimedia Broadcast/Multicast Service, Multimedia Broadcast Multicast Service) mobile TV are well known and loved by people. It can be predicted that in the near future, driven by the ever-expanding mobile communication transmission bandwidth and the ever-changing chip integration technology, the transmission quality and transmission size of wireless audio and video data service signals will have a qualitative leap. However, due to the portability requirements of mobile terminals, mobile streaming services will always be plagued by problems such as small terminal display screens and limited sound output quality. If the wireless audio and video data transmitted by mobile devices such as mobile phones can be transferred to output devices such as TV sets, it will undoubtedly bring breakthroughs in the development of this data service.

The present invention is to realize the output switching function of audio and video data from a mobile phone terminal to a TV set and the like through a new generation of short-distance wireless transmission technology—UWB (Ultra Wideband, ultra-wideband) technology. UWB technology, also known as pulsed radio technology, uses pulse modulation—fast rising and falling pulses with a width of nanoseconds (1ns=10-9s). The frequency spectrum covered by the pulses ranges from DC to GHz. After pulse shaping It can be sent directly to the antenna for transmission. The pulse interval (pulse peak-to-peak time) used by UWB technology is generally 10 to 100 femtoseconds (1ps=10-12S), and the shape of the spectrum can be adjusted according to needs. UWB signals are sparsely distributed on the time axis, and their power spectral density is quite low; moreover, multiple UWB signals can be sent together without interfering with each other. In buildings, UWB can achieve data transmission above 100Mbps with extremely low spectral density. rate. In order to ensure that defense facilities and GPS satellites are not affected, according to the regulations of the FCC (Federal Communications Commission), the frequency band used by UWB is between 3.1GHz and 10.6GHz. Due to the many excellent features of UWB technology, it has broad application prospects. Recently, technologies such as Wireless USB, WirelessIEEE 1394, and UWB BlueTooth, which have attracted much attention, are all built on UWB technology.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and system for switching and outputting signals of mobile equipment, so as to provide audio and video services with higher definition and high quality.

In order to solve the above problems, the present invention provides a mobile terminal signal transfer system, which is used for data processing of streaming media RTP packets and transfer to the output device, including a forwarding device on the mobile terminal side and a transfer device on the output device side The receiving device, the forwarding device and the receiving device jointly or separately complete the processing of the streaming media data, so that the processed data is suitable for playing on the output device, the forwarding device is connected to the receiving device through ultra-wideband technology, In order to forward the mobile terminal side data to the output device side.

Further, the forwarding device includes a streaming media module and a forwarding module, and the receiving device includes a receiving module and a data processing module, wherein the streaming media module of the forwarding device is used to receive streaming media RTP packets from the mobile communication network, and is also used to Together with the data processing module of the receiving device, the framing, decoding and synchronization operations of the streaming media data are completed. The forwarding module and the receiving module are used for negotiating ultra-wideband communication, establishing an ultra-wideband communication link, and completing data transmission respectively and receive operations.

Further, the streaming media module receives the RTP packet from the SOCKET of the mobile terminal.

Further, the streaming media module of the forwarding device is used for buffering and framing the RTP packets, the forwarding module is used for forwarding the framed data to the receiving module, and the data processing module of the receiving device uses It is used to decode and synchronize the received data.

Further, the streaming media module of the forwarding device is used to frame and decode RTP packets, the forwarding module is used to forward the decoded audio and video data and synchronization information to the receiving module, and the data processing module It is used to synchronize the received data according to the synchronization information.

In order to solve the above-mentioned technical problems, the present invention also provides a mobile device signal forwarding method, which is implemented based on a mobile device signal switching system, and the switching system includes a forwarding device on the mobile terminal side and a receiving device on the output device side. device, the method comprising the steps of:

(a) The data processing step refers to processing the media stream data of the mobile terminal so that the processed data is suitable for playing on the output device, which is completed jointly or independently by the forwarding device and the receiving device;

(b) The step of data transfer, which means that the forwarding device and the receiving device forward the data on the mobile terminal side to the output device side through ultra-wideband technology.

The data transfer step further includes: the forwarding device and the receiving device conduct UWB communication negotiation and establish a UWB communication link; and the forwarding device and the receiving device use the established UWB communication link to send or receive data.

Further, before the data processing step, it also includes: the forwarding device receives RTP packets from the mobile communication network, and the data processing includes completing framing, decoding and synchronization operations on the received RTP packets.

The data processing step further includes: the forwarding device performs buffering and framing operations on the RTP packets received from the mobile communication network, and the receiving device performs decoding and synchronization operations on the received data.

The data processing step further includes: the forwarding device framing and decoding the RTP packets received from the mobile communication network, and the receiving device performs synchronous operation on the received data according to the synchronization information.

Compared with the prior art, the system and method of the present invention can quickly and efficiently transfer the audio and video content of streaming media services on mobile devices (such as mobile phones and videophones) to TVs, computers, etc. On the output device of the screen, so as to provide users with higher definition and high-quality audio and video business services.

Description of drawings

Fig. 1 is a schematic block diagram of a signal switching system for a mobile device of the present invention.

FIG. 2 is a schematic diagram of a specific application of the mobile device signal transfer system of the present invention.

Fig. 3 is a flow chart of the signal transfer method of the mobile device in the present invention when it is in the A working mode.

Fig. 4 is a flow chart of the mobile device signal transfer method in the B working mode of the present invention.

Fig. 5 is a flow chart of the mobile device signal transfer method in the C working mode of the present invention.

Fig. 6 is a working flow chart of the mobile device signal switching system of the present invention having three optional working modes at the same time.

Detailed ways

The mobile device signal switching system of the present invention is used to receive streaming media RTP packets from the mobile communication network and perform data processing and switching output equipment. As shown in Figure 1, the switching system of the present invention includes a forwarding device located on the mobile device side and receiving means on the side of the output device, wherein,

The forwarding device is used to receive the streaming media RTP packet from the mobile communication network, and the forwarding device or the receiving device jointly or separately completes the processing of the streaming media RTP data, so that the processed data is suitable for playing on the output device,

The forwarding device is connected with the receiving device through ultra-wideband technology, so as to forward the data at the mobile terminal side to the output device side. The data at the mobile terminal side here refers to the data processed or unprocessed by the forwarding device to be sent to the receiving device.

When performing data processing operations, data processing is performed in the order of framing, decoding, and synchronization, or data processing is performed in the order of framing, synchronization, and decoding. In the processing mode of decoding first and then synchronizing, the data processing is completed by the forwarding device and the receiving device together, including the following two situations:

1. The framing operation is completed by the forwarding device, and the decoding operation and synchronization operation are completed by the receiving device;

2. The framing and decoding operations are completed by the forwarding device, and the synchronization operation is completed by the receiving device;

The data transfer function from the mobile device to the output device is jointly completed by the forwarding device and the receiving device. After the UWB communication negotiation between the forwarding device and the receiving device, a UWB communication link is established, and the link is used to transmit data to the mobile device side before or during processing. Streaming media data is transferred to the output device side.

The forwarding device on the mobile device side and the receiving device on the output device side are introduced respectively below.

Forwarding device:

The forwarding device is integrated inside portable devices such as mobile devices (such as mobile phones), as shown in Figure 2, and is mainly responsible for forwarding the audio and video signals of mobile devices such as mobile phones to the signal receiving module on the output device side through UWB technology .

The forwarding device includes a streaming media module and a forwarding module, wherein the streaming media module is realized by internal software of a mobile terminal (mobile phone), and is responsible for customizing, managing and receiving (and analyzing) audio and video signals based on wireless mobile transmission for streaming media services. The forwarding module is a signal sending module using UWB technology.

The mobile phone is taken as an example for detailed description below.

The mechanism of this forwarding device includes the following three modes:

A mode: The forwarding module directly forwards the RTP (Real-time Transport Protocol) packet received by the streaming media module from the SOCKET of the mobile phone to the receiving device through UWB.

Mode B: After receiving the RTP packet, the streaming media module completes the RTP packet buffering and framing of the RTP packet, and then the forwarding module forwards the undecoded original audio and video frames to the receiving device through the UMB.

C mode: After the streaming media module receives the RTP packet, it completes the framing and decoding of the RTP packet of the RTP packet, and then the forwarding module sends the decoded audio and video data through UWB in the form of audio frames and video frames, and simultaneously sends out audio and video Frame synchronization information.

The synchronization information refers to the information indicating the time of the data packet in the timestamp field of the RTP header, which is defined by the RTP transmission protocol.

The above is an example of the processing method of decoding first and then synchronizing. Of course, it is also possible to perform synchronization first and then decode, but compared with the processing method of synchronizing first and then decoding, the processing method of decoding first and then synchronizing is more familiar and familiar recognized.

Receiver:

The receiving device is externally connected to an output device such as a TV terminal or a computer terminal, as shown in FIG. The output device broadcasts. Correspondingly, the receiving device also includes a data processing module and a receiving module. Corresponding to the working mode of the forwarding device, the receiving device also has four working modes:

When it is known that the forwarding device is working in mode A, after the receiving module receives the audio and video signals in the RTP packet, the data processing module performs framing, decoding, and synchronization processing and then sends it to an output device such as a TV for playback.

When it is known that the forwarding device works in B mode, after the receiving module receives the undecoded audio and video frames, the data processing module decodes and synchronizes them, and then sends them to output devices such as TVs for playback.

When it is known that the forwarding device works in C mode, after the receiving module receives the decoded audio and video frame signals, the data processing module performs synchronization according to the synchronization information and sends them to output devices such as TVs for playback.

In the mode A mentioned above, it can be considered that the data processing is independently completed by the data processing module of the receiving device. In modes B and C, the data processing is jointly completed by the streaming media module of the forwarding device and the data processing module of the receiving device.

The output device refers to an ordinary TV set, computer, etc., and is responsible for playing the audio and video signals input from the audio and video signal receiving device. If the receiving device is externally connected to an output device such as a TV in the form of a receiver, the receiving device can use the existing audio and video input ports of the TV to easily output the synchronized streaming media audio and video signals to the TV and other devices to play, so that the output devices such as TVs do not need to make any changes to be competent for their output functions in the system.

In the system, the mode of the transponder on the mobile device side and the receiving device on the output device side can be any of the above three modes, that is to say, the same system only needs to have one of the modes to complete the mobile phone streaming media audio and video signal Function to transfer to an output device such as a TV. The difference is that the three modes have different requirements on the complexity of the receiving device on the output device side. The receiving device working in the A mode needs to integrate functions such as framing, decoding, and synchronization, so it is the most complicated. However, the mobile device (such as a mobile phone) with a built-in forwarding device working in the A mode has a relatively light load and saves power. In this mode, the mobile phone can be regarded as a receiver and descrambler for audio and video signals from the mobile communication network, and its function is somewhat similar to that of a digital TV set-top box. In contrast, the receiving device in the C mode is the simplest, but at this time the forwarding device has to complete more work. Of course, if the same forwarding system has the above two or more working modes at the same time, before the system works, the user needs to set and select a working mode on the mobile device side, and then notify the receiving device to start the corresponding mode when the UWB transmission link is established. working mode.

Corresponding to the above mobile device signal transfer system, the mobile device signal transfer method of the present invention includes steps:

Step 1: The data processing step refers to processing the media stream data of the mobile terminal, including framing, decoding and synchronizing operations on the streaming media RTP packets, so that the processed data is suitable for playing on the output device, and the forwarding device and the receiving device jointly or individually;

Step 2: the data transfer step, which means that the forwarding device and the receiving device forward the data on the mobile terminal side to the output device side through ultra-wideband technology. The data transfer step further includes: the forwarding device and the receiving device conduct UWB communication negotiation and establish a UWB communication link; the forwarding device and the receiving device send or receive data using the established UWB communication link.

The following describes the transfer methods of each mode of the transfer device one by one:

(1) When working in A mode:

The mobile device signal transfer method of the present invention includes the following steps, as shown in Figure 3:

Step 301: the streaming media module of the forwarding device receives the audio and video RTP data packets transmitted from the mobile communication network from the socket (socket) port of the mobile phone;

Step 302: the forwarding module and the receiving module establish a connection on the UWB communication link, and start to transmit RTP data packets;

Step 303: the data processing unit of the receiving device classifies the received RTP packets into audio packets and video packets and completes the framing work;

Step 304: The data processing unit of the receiving device sends the audio and video frame data after framing to the audio and video decoder for decoding and synchronization;

Step 305: Send the decoded and synchronized audio and video data to an output device such as a TV for playback.

(2) When working in B mode:

The mobile device signal transfer method of the present invention includes the following steps, as shown in Figure 4:

Step 401: the streaming media module of the forwarding device receives the audio and video RTP data packets transmitted from the mobile communication network from the socket port of the mobile phone;

Step 402: The streaming media module of the forwarding device classifies the received RTP packets according to audio packets and video packets and completes the framing work;

Step 403: The forwarding module and the receiving module establish a connection on the UWB communication link, and start to transmit undecoded audio and video frame data;

Step 404: The data processing unit of the receiving device sends the received audio and video frame data that has not yet been decoded to the audio and video decoder in the receiver for decoding and synchronization;

Step 405: Send the decoded and synchronized audio and video data to an output device such as a TV for playback.

(3) When working in C mode:

The mobile device signal transfer method of the present invention includes the following steps, as shown in Figure 5:

Step 501: The streaming media module of the forwarding device receives the audio and video RTP data packets transmitted from the mobile communication network from the socket port of the mobile phone;

Step 502: The streaming media module of the forwarding device classifies the received RTP packets according to audio packets and video packets and completes the framing work;

Step 503: The streaming media module of the forwarding device sends the audio and video frame data after framing to the audio and video decoder in the mobile phone for decoding;

Step 504: The forwarding module and the receiving module establish a connection on the UWB communication link, and start to transmit the decoded audio and video frame data and audio and video frame synchronization information;

Step 505: Synchronize the received audio and video frame data and send it to an output device such as a TV for playback.

Fig. 6 is a working flowchart of the forwarding device in the switching system of the present invention built in the mobile phone and having three working modes at the same time.

The present invention uses emerging UWB technology as the wireless bearer of audio and video signal forwarding instead of Bluetooth 2.0 and other technologies. The requirements for clarity, audio and video quality, and screen size are bound to become higher and higher, and the bandwidth required for streaming audio and video transmission to meet this requirement is also increasing. At present, ordinary high-definition TV uses a transmission rate of 3 to 7Mbps, and HDTV uses a transmission rate of 19 to 24Mbps. Technologies such as Bluetooth 2.0 with a transmission bandwidth of only 2Mbps may be somewhat inadequate in multimedia transmission. And UWB is as high as 480Mbps within ten meters, and the data transmission rate of more than 100Mbps in buildings is obviously more qualified for this role.

Compared with the prior art, the system and method of the present invention can quickly and efficiently transfer the audio and video content of streaming media services on mobile devices (such as mobile phones and videophones) to TVs, computers, etc. On the output device of the screen, so as to provide users with higher definition and high-quality audio and video business services.

Claims (10)

1, a kind of portable terminal Signal Switching System, it is characterized in that: this system is used for Streaming Media RTP bag is carried out data processing and is transferred to output equipment, comprise the retransmission unit that is positioned at mobile terminal side and be positioned at the receiving system of output equipment side, described retransmission unit and described receiving system are finished the processing to stream medium data jointly or separately, so that the data adapting after handling is play at output equipment, described retransmission unit is connected with described receiving system by super-broadband tech, with the mobile terminal side data forwarding to the output equipment side.

2, the system as claimed in claim 1, it is characterized in that: described retransmission unit comprises Streaming Media module and forwarding module, described receiving system comprises receiver module and data processing module, wherein the Streaming Media module of retransmission unit is used for the receiving stream media RTP bag from mobile communication network, also be used for finishing jointly framing, decoding and the simultaneous operation of stream medium data with the data processing module of receiving system, described forwarding module and receiver module are used to carry out ultra-wide band communication to be consulted, and set up the ultra-wide band communication link, and finish the transmission of data respectively and receive operation.

3, system as claimed in claim 2 is characterized in that: described Streaming Media module is to receive the RTP bag from the SOCKET of portable terminal.

4, system as claimed in claim 2, it is characterized in that: the Streaming Media module of described retransmission unit is used for the RTP bag is cushioned the framing operation, described forwarding module is used for giving described receiver module with the data forwarding behind the framing, and the data processing module of described receiving system is used for the data that receive are decoded and simultaneous operation.

5, system as claimed in claim 2, it is characterized in that: the Streaming Media module of described retransmission unit is used for the RTP bag is carried out framing, decoding, described forwarding module is used for decoded audio, video data and synchronizing information are transmitted to described receiver module, and described data processing module is used for the data based synchronizing information that receives is carried out simultaneous operation.

6, a kind of mobile device signal forwarding method, it is characterized in that, this method realizes that based on the mobile device Signal Switching System described adapting system comprises the retransmission unit that is positioned at mobile terminal side and be positioned at the receiving system of output equipment side that this method may further comprise the steps:

(a) data processing step refers to the media stream data of portable terminal is handled, so that the data adapting after handling is play at output equipment, is finished jointly or separately by retransmission unit and receiving system;

(b) data switching step refers to that retransmission unit and receiving system arrive the output equipment side by super-broadband tech with the mobile terminal side data forwarding.

7, method as claimed in claim 6 is characterized in that, described data switching step further comprises: described retransmission unit and receiving system carry out ultra-wide band communication to be consulted, and sets up the ultra-wide band communication link; And the ultra-wide band communication link of retransmission unit and receiving system utilization foundation sends or receives data.

8, method as claimed in claim 6 is characterized in that, also comprises before the described data processing step: described retransmission unit receives the RTP bag from mobile communication network, and described data processing comprises finishes framing, decoding and simultaneous operation to the RTP bag that receives.

9, system as claimed in claim 8, it is characterized in that, described data processing step further comprises: described retransmission unit cushions the framing operation to the RTP bag that receives from mobile communication network, and described receiving system is decoded and simultaneous operation to the data that receive.

10, system as claimed in claim 8, it is characterized in that, described data processing step further comprises: described retransmission unit carries out framing, decoding to the RTP bag that receives from mobile communication network, and described receiving system carries out simultaneous operation to the data based synchronizing information that receives.

Images