CN101563886A - Redundant media packet streams - Google Patents
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- CN101563886A CN101563886A CNA2007800266770A CN200780026677A CN101563886A CN 101563886 A CN101563886 A CN 101563886A CN A2007800266770 A CNA2007800266770 A CN A2007800266770A CN 200780026677 A CN200780026677 A CN 200780026677A CN 101563886 A CN101563886 A CN 101563886A
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Abstract
This invention concerns the transmitting and receiving of digital media packets, such as audio and video channels and lighting instructions. In particular, the invention concerns the transmitting and receiving of redundant media packet streams. Samples are extracted (556) from a first (904) and second (906) media packet stream. The extracted samples are written to a buffer (910) based on the output time of each sample (556). Extracted samples having the same output time are written to the same location in the buffer. Both media packet streams are simply processed all the way to the buffer without any particular knowledge that one of the packet streams is actually redundant. This simplifies the management of the redundant packet streams, such as eliminating the need for a ''fail-over'' switch and the concept of an ''active stream''. The location is the storage space allocated to store one sample. The extracted sample written to the location may be written over another extracted sample from a different packet stream previously written to the location. These extracted samples written to the same location may be identical.
Description
Technical field
The present invention relates to transmission and reception to the grouping of the Digital Media such as Voice ﹠ Video passage and luminous instruction.These media channels are sent to receiver device as media packet from transmitter apparatus, to be used for broadcast.Particularly, the present invention relates to transmission and reception to redundant media packet streams.The computer software that the present invention relates to the method for transmitter apparatus, receiver device, data network, receiving media packet streams and carry out this method.
Background technology
For a long time, use the cable of application specific that the media channel such as the Voice ﹠ Video passage is transmitted.For example, use the double-core speaker cables that a left side and right voice-grade channel are sent to loud speaker from amplifier.
Recently, use the agreement such as unicast or multicast to come the transfer medium signal by the computer based network.Clean culture is the method that sends grouping by computer network to single goal ground.Wish to receive the media device of grouping at each, must retransmit unicast packet.
Typically, multicast refers to ip multicast, and ip multicast is an agreement of utilizing multicast address to send effectively to a plurality of receiver devices simultaneously on the TCP/IP network.Computer network then operation receives on the equipment of multicast grouping to route the packet in each hope on the network.
Media network can allow to send and receive redundant media packet streams.Known, transmitter is handled main media packet streams continuously, and ignores the redundant copies of media packet streams simply.In main stream of packets, detect (that is, the transmission path in the network disconnects) in the incident of problem, " fault recovery " switch occurs.In case activate this switch, receiver device is ignored main media packet streams, and handles redundant copies.
Summary of the invention
On the one hand, the invention provides the receiver device that is used to receive from the media packet streams of data network, this receiver device comprises:
First data-interface is used to receive first media packet streams, and described first media packet streams comprises the sampling of media channel;
Second data-interface is used to receive second media packet streams, and described second media packet streams comprises the sampling of media channel;
Processor is used for extracting sampling from first media packet streams and second media packet streams, and the output time of definite sampling of being extracted;
Buffer is used for the sampling that temporary transient storage is extracted, to be used for output; And
Wherein, thus described processor operations based on the output time of correspondence with in the sampling write buffer that is extracted, so that the sampling with identical output time of being extracted is written into same position in the buffer.
Like this, receiver device can be actually under the redundant situation and handle two media packet streams all the time simply in its write buffer not knowing one of stream of packets especially.This has just simplified the management to redundancy packets stream, has for example eliminated the demand for " fault recovery " switch.In addition, the notion that no longer needs " initiatively stream ".
Buffer can be designed as the output time sampling of being extracted of storing predetermined maximum number in order according to each sampling of being extracted.The position is the memory space that branch is used in a sampling of storage.First of writing position extracts sampling and the second extraction sampling from different grouping stream that before write this position can be rewritten.The first and second extraction samplings that write same position can be identical.
Buffer can be associated with an output channel, and each media packet streams can be directed to identical output channel.Each media packet streams can comprise two or more media channels.
Receiver device also can comprise the 3rd data-interface, is used to receive the 3rd media packet streams of the sampling that comprises media channel, and wherein, thereby described processor is further operated the output time of the sampling of extracting sampling and determining to be extracted from the 3rd media packet streams.Owing to do not need to be used to handle the cura specialis control of redundancy packets stream, therefore can increase the number of redundancy packets stream at an easy rate, and utilize same way as that all stream of packets are handled.
First and second media packet streams can receive from the different pieces of information interface of the identical transmitter apparatus that is connected with data network.
Processor also can be operated to detect ruined sampling and to prevent that these ruined samplings are written in the buffer.
All samplings that comprised in the media packet of first media packet streams can all not be comprised in any single medium grouping of second media packet streams.Carry out packetizing even without the sampling to two Media Streams in the same manner, processor also can be operated to use same way as to extract and write sampling.
The sampling of media channel can have related timestamp, and processor can be operated the output time with the sampling of determining based on corresponding timestamp to be extracted.This timestamp can be that absolute time is stabbed, and can represent the sampling time.
The present invention can also comprise the method that is used to receive from the media packet streams of data network, and the method comprising the steps of:
Receive first media packet streams, described first media packet streams comprises the sampling of media channel;
Receive second media packet streams, described second media packet streams comprises the sampling of media channel;
From described first media packet streams and second media packet streams, extract sampling;
The output time of definite sampling of being extracted;
Based on corresponding output time, with in the sampling write buffer that is extracted to be used for output, will have the same position in the sampling write buffer that is extracted of identical output time thus.
On the other hand, the invention provides computer software and carry out said method with the operation receiver device.
Aspect another, the invention provides and be used for sending the transmitter apparatus of media packet streams to receiver device by data network, this transmitter apparatus comprises:
One or more data-interfaces are used for sending first media packet streams and second media packet streams to receiver device, and described Media Stream comprises one or more media channels;
Processor carries out packetizing based on the request from receiver device to media channel, is used for the media packet streams that sends by data-interface with establishment; And
Controller makes described processor create two independently media packet streams, described two independently media packet streams comprise the identical media passage that will be sent to receiver device.
This request can be addressed to first media packet streams that comprises media channel first interface of receiver device, and second media packet streams that will comprise the identical media passage is addressed to second interface of receiver device.This request can be the single message that receives from receiver device.
Transmitter apparatus can comprise and is used to second data-interface that sends first data-interface of first media packet streams and be used to send second media packet streams.
Data network can comprise the first and second data sub-networks.Controller can be so that first media packet streams sends by the first data sub-network, and makes second media packet streams be undertaken by second sub-network.Like this, if a data network can't successfully transmit one or more groupings, then transmit identical media channel, and loss of data can not take place via another sub-network.In addition, the first data sub-network can have and the different configuration of the second data sub-network, for example different host-host protocols.
The invention still further relates to two media packet streams that are used for to comprise the identical media passage and be sent to the method and the software of receiver device.
Aspect another, the invention provides the computer network that comprises above-mentioned receiver device and transmitter apparatus.
Description of drawings
Referring now to accompanying drawing example of the present invention is described, in the accompanying drawings:
Fig. 1 is the schematic diagram of the network that can together use with the present invention;
Fig. 2 is to use the schematic diagram of the single grouping of the media packet streams that sends by network of the present invention;
Fig. 3 (a) is how to realize redundant schematic diagram in data network to 3 (d);
Fig. 4 is the schematic diagram that uses the network of redundant interface according to embodiment of the present invention;
Fig. 5 is another schematic diagram that another embodiment according to the present invention is used the network of redundant interface; And
Fig. 6 is the schematic diagram of buffer of the output channel of receiver device.
Specific embodiments
The networking component summary
With reference to Fig. 1, data network has been described wherein.Data network 100 comprises transmitter apparatus 110 and receiver device 112.In network 100, may there be a plurality of transmitter apparatus 110 and a plurality of receiver device 112, but for the sake of clarity, one of them only be discussed here.In addition, equipment 110 and 112 may be able to carry out sends and receives two functions, but here for for the purpose of clear more, equipment 110 and 112 is described as only carrying out separately a function.
APEC 122/126 is with software or hard-wired assembly.In this network 100, APEC122/126 is on the identical physical equipment with APE 120/124, but can for example can be on another equipment or central computer that is connected with network 114 away from APE120/124 alternatively.APEC122/126 provides the general introduction of APE 120/124 and connected any audio frequency apparatus 140 and 142 to the user.But transmitter apparatus 110 has a plurality of sendaisles of can being named, also can offering the receiver device 112 on the network 114; This is called as advertisement.Receiving equipment 112 has a plurality of receive paths.Named sendaisle can be distributed to receive path; This is called as reservation.APEC 122 and 126 will be configured APE 120/124, so that media signal is routed to receive path from sendaisle.
Receive and send APEC 126 and 122 by network 114 exchange configuration information and control messages.Via the 118 exchange configuration informations of the service discovery database such as DNS-SD.This database can utilize distributed way to realize, makes each equipment 110 and 112 store and provide the configuration information that is associated with its APEC 122/126.Sometimes need additional control messages to finish booking process, and make media signal be routed.These additional control messages are receiving APEC 126 and are sending transmission between the APEC 122.
Himself APE 120/124 of each APEC 122/126 configuration, and carry out alternately with other APEC 122/126 is to mate between the APE 120/124 that guarantees to be configured in communication.
In each equipment 110 and 112 inside, be called as " TX passage " such as the input channel from the passage of audio frequency apparatus 140, because they will send by network, and the output channel such as the passage that is sent to audio frequency apparatus 142 is called as " RX passage ", because they will receive data from network.
At first, equipment must connect to create network 104.With reference to Fig. 4, four media devices (keyboard 144, guitar 140, be used for the left passage 146 and the right passage 148 that is used for CD of CD) are connected with four input channels of transmitter apparatus 110.In this example, keyboard uses identical sampling rate and sample format (such as 48kHz, 24 bits, pcm encoder) with guitar.The CD passage has different sampling rates and sample format (such as 44.1kHz, 16 bits, pcm encoder).
Media packet streams
Referring now to Fig. 2, it schematically shows single medium grouping 550.A plurality of media packet that order sends have constituted media packet streams.Each media packet 550 in the identical media stream comprises identical media channel.Each media packet 550 comprises frame 554.In every frame 554 of media packet 550, distribute sample space 556 must for each media channel.This sample space is also referred to as time slot.Each grouping 550 has time slot of every passage, has 554 1 sample spaces 556 of every hardwood thus.
Each frame 554 stabs with absolute time and is associated, and this absolute time is stabbed and also is recorded in the grouping.The notion of time is synchronous between all devices on the network 100 110 and 112, so their share common clock.The all devices 112 of the broadcast of the media channel that is comprised in the control frame 554 must synchronously broadcast the passage in each frame.This is based on, and timestamp in each frame 554 finishes.For example, with reference to common clock, each playing device can broadcast the sampling 556 in each frame 554 with the predetermined delay that surpasses the absolute time stamp.
Redundant media packet streams
Referring now to Fig. 4 redundancy is described.Redundancy is to realize by on the distinct interface of the network equipment stream of packets being duplicated.Mainly redundancy is controlled at the APEC layer.APEC can be programmed to the given stream of packets on APE and will send or receive by the particular data interface.If send the specific medium stream of packets redundantly, APEC understands two or more copies of programming stream of packets so.Copy sends from first interface 130 of APE 120, and second copy of stream of packets sends from second interface 136 of APE 120.
Similarly, the APEC 126 that receives is programmed to its APE 124 by each data- interface 132 and 134 and receives copy.Each stream of packets of duplicating is programmed to sampling is offered identical output channel.This means that stream of packets is written in the identical buffer.Owing to the sampling in two stream of packets is identical with determined output time, therefore identical sampling is handled, and override buffer, to be used for output channel with it.Usually, this state that will lead to errors and compete.Yet, because all redundant media packet streams all comprise the identical sampling with synchronous output time, therefore which sampled data of which media packet streams at first is written into buffer and not serious, because all copies that repeats are override simply, thereby in fact a portion copy with each sampling sends to output channel.
Output time indication sampling will be written to which position in the buffer.The output time of sampling is based on the timestamp that is associated with sampling in the media packet streams and definite.This can comprise the delay of each media packet streams and skew are compensated.Note, do not need to add the physics timestamp for each sampling interpolation timestamp of media channel to each sampling.If in a grouping, send 20 samplings, then add timestamp to first sampling simply and also implied remaining interpolation timestamp from the cycle of single medium signal voice data.Therefore, remaining sampling also has timestamp by association.
Fig. 3 shows and realize some redundant modes on data network.Interface can be connected to independently network 114 (a) and 114 (b) or be connected to single network 114 via a plurality of paths.Interface 138 and 139 among Fig. 8 (c) is respectively second redundant interface of transmitter 110 and receiver 112.The interface that Fig. 8 (d) shows on the transmitter 110 can send by a plurality of separation interfaces on receiver 112.
For simplicity, when sending or receive, APE 120 and 124 only is configured to and is equal to interface and sends or receive.Main interface 130 on APE 120 communicates with the main interface 132 on another APE 124.Interface 136#1 on APE 120 only with another APE 124 on interface 134#1 communicate.By that analogy.This just makes it possible to make marks from the outside to each APE interface.For example, hardware originally on one's body, main interface can black, first redundant interface is red, second redundant interface be a blueness, or the like.This just makes the user can easily distinguish different interfaces, and guarantees in their quilt wiring correctly of assembly process.
Redundancy in the unicast protocol
On network 114, media channel is carried out advertisement, can utilize unicast protocol to subscribe this media channel with the indication receiver.Receiver can be asked the TXT record of receiving media passage, and this TXT record comprises the information of media channel, comprises sampling rate (rate), bit-depth (bits) and coding (enc) (1=PCM)." txtvers " field is the version number of TXT record." nchan " field is the largest passages number of each dynamic beam.Each dynamic beam of interface box (stage-box) 110 has maximum four passages, and this is enough to send all inputs 144,140,146 and 148 by single grouping.The id field is any physical gap marker symbol that is used for identifying briefly its passage by APEC 120.The passage of " keyboard (keyboard) " by name just in time has ID 16.Except sending APEC 120, this ID is only helpful to the dynamic beam on the receiver APEC 124 configuration APEC 122.
The TXT record of advertisement comprises the field that is marked as " nred ".The value of " nred " has been indicated the number of redundant interface.If omit this field, then this value is regarded as zero.The null value indication does not have redundant interface, this means that the APE 120 of transmitter 110 only supports primary traffic.Value 1 indication has single redundant interface.Indicate a plurality of redundant interfaces (being numbered 1..n) greater than 1 value.
Except sending single dynamic beam request, the APEC 126 that receives can also send a request to redundant interface available on each transmitter, and each has different interface field.Alternatively, the request to redundancy stream that is sent to redundant interface can be merged in the initial request message to stream of packets that is sent to the nonredundancy interface.
As shown in Figure 4, except main interface 130 (#0), interface box 110 also has redundant interface 136 (#1).TXT record to the passage advertisement formats as follows now:
Record: keyboard@stage-box._netaudio_chan._udp.local TXT
txtvers＝2
rate＝48000
bits＝24
enc＝1
nchan＝4
id＝16
nred＝1
In this locality, blender 112 sends following ' creating the RX bundle ' message from its APEC 126 to its APE 124:
| Field | Value | Remarks |
| Destination address | 169.254.28.12 | The master data interface IP address of blender |
| Destination interface | 26528 | |
| |
0 | The master data interface is #0 |
| Number of |
2 | |
| Mapping for time slot 1 | [8] | Array with an element: |
| Mapping for time slot 2 | [11] | Array with an element: |
| Field | Value | Remarks |
| Destination address | 169.254.132.15 | The second data-interface address of blender |
| Destination interface | 28452 | |
| |
1 | Second data-interface is #1 |
| Number of |
2 | |
| Mapping for time slot 1 | [8] | Array with an element: |
| Mapping for time slot 2 | [11] | Array with an element: |
Each message disposes the stream of packets of a reception to interface 132 or 134.Second interface 134 (#1) can use the port numbers identical or different with main interface 132, and this depends on the design of APE 124.This example hypothesis is selected different ports.
Must create two separated funiculuses as blender 112 on its APE 124, it need create the dynamic beam of two separation on interface box 110.Following message is sent to APEC 122 from APEC 126:
| Field | Value | Remarks |
| Destination address | 169.254.28.12 | The master data interface IP address of blender |
| Destination interface | 26528 | |
| |
0 | The master data interface is #0 |
| Number of |
2 | |
| |
16 | The ID of |
| Time slot | ||
| 2 | 17 | The ID of guitar@stage-box |
| Field | Value | Remarks |
| Destination address | 169.254.132.15 | The second data-interface address of blender |
| Destination interface | 28452 | |
| |
1 | Second data-interface is #1 |
| Number of |
2 | |
| |
16 | The ID of |
| Time slot | ||
| 2 | 17 | The ID of guitar@stage-box |
Finally, interface box 110 is created two bundles on local APE 120, to satisfy these requests.Following message is sent to APE 120 from APEC 122:
| Field | Value | Remarks |
| Destination address | 169.254.28.12 | The master data interface IP address of blender |
| Destination interface | 26528 | |
| Interface | 0 | (on the interface box) master data interface is #0 |
| Number of |
2 | |
| The TX passage of |
16 | |
| The TX passage of |
17 | |
| Field | Value | Remarks |
| Destination address | 169.254.132.15 | The second data-interface address of blender |
| Destination interface | 26452 | |
| Interface | 1 | (on the interface box) second data-interface is #1 |
| Number of |
2 | |
| The TX passage of |
16 | |
| The TX passage of |
17 | |
The multicast redundancy
In order to support redundant multicast, transmitter 110 is created some different stream of packets, and it is separated static Shu Jinhang advertisement as what be associated with single bundle title.
For example, for two copies of advertisement bundle b1 and b2, promptly main beam 130 and second restraints 136, and interface box 110 will at first be stated the multicast address of each bundle.Main beam uses 239.254.46.46.Second bundle uses 239.254.98.147.For this example, suppose that two bundles all use identical interface (29061).
Create two service logs (SRV), record of each stream of packets.Owing to each stream of packets is carried out identical format, therefore only needs single TXT record.
Record: b1@stage-box._netaudio_bund._udp.local SRV
012906146.46.254.239.mcast.local
Record: b1@stage-box._netaudio_bund._udp.local SRV
1129061 147.98.254.239.mcast.local
Record: b1@stage-box._netaudio_bund._udp.local TXT
txtvers＝1
rate＝48000
bits＝24
enc＝1
nchan＝4
If only use single (master) interface, then " priority " field (being expressed as first number) among the SRV is set to 0.The indication of non-zero priority is applied to redundant interface with bundle, is interface 1 in this example.
These bundle advertisements are decoded and made receiver can dispose suitable bundle on each interface.APEC 126 is configured to APE 124 to receive main beam on first main interface 132, and receives second bundle on second interface 134.
Buffer management
No matter use clean culture or multicast protocol, the mode of the stream of packets that receiver device 112 administrative institutes duplicate is identical.
With reference to the data network among Fig. 5 902, it shows transmitter apparatus 110 and sends two identical stream of packets.A stream of packets 904 sends autonomous data-interface 130, the second stream of packets 906 and sends from first redundant interface 136.Two stream of packets all comprise the sampling that media channel produced that is connected with keyboard 144.
The first main stream of packets 904 is received at master data interface 132 places by receiver device (being amplifier 908).Second redundancy packets stream 906 is received at the first redundant data interface, 134 places by amplifier 908.APE 124 handles stream of packets 904 and 906 each according to the instruction that receives from APEC 126.
Here, APE 124 will handle the stream of packets 904 and 906 that receives, and to broadcast by loud speaker 142, loud speaker 142 is connected to the output channel 2 of amplifier 908.Alternatively, the equipment that is connected to output channel 2 can not be playing device, can be for example blender or amplifier.
The method of the write buffer of will sampling is described referring now to Fig. 6.Handle stream of packets 904 and 906 independently, and APE 124 does not need to recognize especially that they are identical in fact.
Because each sampling that receives all has related timestamp, this timestamp has the absolute time benchmark, therefore can easily determine and the corresponding output time of absolute time benchmark.In this example, must with identical sample-synchronous be sent to output channel, so the output time of each sampling also must be identical.Therefore, if some samplings do not receive in order, then also it can be write correct interval, because can select correct interval based on the output time of this sampling.If some samplings belong to the time interval of having been broadcasted, then will lose this sampling simply.
First stream of packets 904 and second stream of packets 906 all utilize this mode to handle.Because sampling and the output time of determining thereof are identical, therefore identical sampling is write same interval by twice.Earlier will be from the sampling of first stream of packets 904 or earlier will be unimportant from the sampling write buffer 910 of second stream of packets 906, the final result that temporarily is stored in the sampling in the buffer is all with identical.
Like this, if lost during the transmission that is grouped in transmitter apparatus 110 from first stream of packets 904, so will sampling write buffer 910 from the same packets in second stream of packets 906 in.In this case, only with these the sampling write buffers in once.Certainly, from the packet loss of second stream of packets 906 time, also opposite situation may take place, and in only will the sampling write buffer 910 from the same packets in first stream of packets 906.
Because APEC 126 knows stream of packets 904 and 906 (more specifically being the particular time-slot in each stream of packets 904 and 906) and comprises identical data, and be sent to the message of APE 124 from APEC 126 above-mentioned, APEC 126 is programmed to APE 124 unconditionally both copies is advanced same buffer, and APE 124 does not need to judge which stream of packets is " current " or " effectively ".Handle on the same intervals (position) of APE 124 in buffer and copy the two, and need not consider earlier in stream of packets 904 and 906 which handled and with in its write buffer, two stream is simple process in normal way all.This has reduced the complexity that the system that can send and receive redundancy packets stream is managed.For example, no longer need to judge whether activate the fault recovery switch.In case set up the path, unless all fail in two paths, otherwise APE 124 or APEC 126 do not need other decision logic.
If sampling is destroyed during Network Transmission, then identification in a single day, those samplings should be lost.The media packet streams that duplicates will guarantee that output buffer receives at least one copy of sampling, and need not to switch between media packet streams.Before sampled data being write shared buffer, carry out any transport level error-tested or mistake and recover.
The actual samples content of each grouping in the media packet streams 904 and 906 does not need identical.For example, can by different way the media channel grouping be turned to stream of packets 904 and 906, so that do not comprise identical sampling from the grouping of each stream.The method of sampling in the write buffer is identical all the time, because regardless of the position of the disassociation frame in dividing into groups, each identical sampling all will be shared output time.In the time of in the write buffer of will sampling, which (position) at interval APE 124 will should be written into to determine this sampling with reference to the output time of each sampling.
The present invention also allows other redundant stream of each self-contained identical media channel.Each media packet streams can be sent to different data-interfaces.Same, APE 124 will handle all stream of packets independently, and the sampling of being extracted is write in the identical buffer, to be used for output channel.
Certainly, sampling 556 can be the mixing of one or more source of media, for example keyboard 144 and guitar 140.Alternatively, can provide blender, before the write buffer of will sampling, it be mixed being used for.
It will be understood by those skilled in the art that under the prerequisite that does not deviate from broadly described the spirit or scope of the present invention, can carry out multiple variant and/or modification the present invention shown in the specific embodiments.
■ when using static bundle, can with arbitrarily easily mode give bundle with channel allocation.Also can realize redundancy by on special interface, creating specific bundle.
The ■ dynamic beam is generally clean culture.Static bundle is generally multicast.If necessary, also dynamic beam can be configured to multicast, perhaps the static state bundle be configured to clean culture.
The I/O of ■ physical channel also can realize with form of software, for example with the form of software of blender, and needs not to be the actual physical connector.
Although the above-mentioned example of ■ has been supposed the channel data of sampling, yet identical protocol will work to the cycle data stream of any fixed size.Utilize the variant of transmission (grouping and bundle) mechanism, also can support the data of aperiodic or variable-size.
It is in order to realize facility that ■ gives time slot allocation isomorphism passage.Can utilize start byte and length in frame, to identify to have the non-isomorphism passage media data of common sampling rate.
■ MIDI is the example of non-cycle data.The same-interface of route audio frequency to Voice ﹠ Video to video can route MIDI to MIDI abstractively to make the user.The same with the cycle grouping, the MIDI grouping will have timestamp, but receiver should not expect that the MIDI data cell will periodically arrive.The aperiodicity data may need periodically " keepalive " message to distinguish to mourn in silence nand function stream.As long as there is the mark of explanation " in this grouping not these data ", then the aperiodicity data can the same auto-polymerization easily with periodic data.
Therefore, existing embodiment all should be considered to exemplary in all respects and and nonrestrictive.
Claims (29)
1. be used to receive the receiver device from the media packet streams of data network, described receiver device comprises:
First data-interface is used to receive first media packet streams, and described first media packet streams comprises the sampling of media channel;
Second data-interface is used to receive second media packet streams, and described second media packet streams comprises the described sampling of described media channel;
Processor is used for extracting sampling from described first media packet streams and described second media packet streams, and determines the output time of the sampling of this extraction;
Buffer is used for temporarily storing the sampling of described extraction, to be used for output; And
Wherein, the sampling with described extraction writes in the described buffer thereby described processor operations is based on corresponding output time, and the sampling that has the extraction of identical output time thus is written into the same position in this buffer.
2. receiver device according to claim 1, wherein, the sampling of the extraction that described buffer can temporary transient storing predetermined maximum number.
3. receiver device according to claim 1 and 2, wherein, described buffer can temporarily be stored the sampling of this extraction in order according to the corresponding output time of the sampling of described extraction.
4. according to claim 1,2 or 3 described receiver devices, wherein, described output time is broadcast time.
5. according to the described receiver device of aforementioned arbitrary claim, wherein, described position is the memory space that branch is used in a sampling of storage.
6. according to the described receiver device of aforementioned arbitrary claim, wherein, second sampling of extracting from different stream of packets that writes this position is before rewritten in first sampling of extracting that is written into described position.
7. according to the described receiver device of aforementioned arbitrary claim, wherein, described first sampling of extracting is identical with described second sampling of extracting.
8. according to the described receiver device of aforementioned arbitrary claim, wherein, described buffer is associated with an output channel, and each media packet streams is directed to identical output channel.
9. according to the described receiver device of aforementioned arbitrary claim, wherein, described receiver device also comprises the 3rd data-interface, be used to receive the 3rd media packet streams of the described sampling that comprises described media channel, wherein, described processor is also operated extracting sampling from the 3rd media packet streams, and determines that the output time of sampling of this extraction and the sampling that will extract based on this corresponding output time write in the described buffer.
10. according to the described receiver device of aforementioned arbitrary claim, wherein, described processor is also operated detecting ruined sampling, and prevents that these ruined samplings are written in the described buffer.
11. according to the described receiver device of aforementioned arbitrary claim, wherein, all samplings that comprised in the media packet of described first media packet streams are not all to be comprised in any single medium grouping of described second media packet streams.
12. according to the described receiver device of aforementioned arbitrary claim, wherein, described first media packet streams and described second media packet streams are that the different pieces of information interface from the transmitter apparatus that is connected with described data network receives.
13. according to the described receiver device of aforementioned arbitrary claim, wherein, the described sampling of described media channel has related timestamp separately, and described processor operations is to determine the output time of the sampling of this extraction based on corresponding timestamp.
14. be used to receive the method from the media packet streams of data network, described method comprises step:
Receive first media packet streams, described first media packet streams comprises the sampling of media channel;
Receive second media packet streams, described second media packet streams comprises the described sampling of described media channel;
From described first media packet streams and described second media packet streams, extract sampling;
Determine the output time of the sampling of described extraction;
Based on the corresponding output time of the sampling of described extraction, the sampling of each described extraction is write in the described buffer to be used for output, the sampling that has the described extraction of identical output time thus is written into the same position in this buffer.
15. method according to claim 14, wherein, the step that described sampling with each described extraction writes in the described buffer comprises: write the sampling of described extraction in order according to the corresponding output time of the sampling of each described extraction.
16. according to claim 14 or 15 described methods, wherein, described output time is broadcast time.
17. according to claim 14,15 or 16 described methods, wherein, described position is the memory space that branch is used in a sampling of storage.
18. according to each described method in the claim 14 to 17, wherein, the step that described sampling with each described extraction writes in the described buffer comprises: first sampling of extracting is write a position, use this first sampling of extracting of rewriting described position from second sampling of extracting of different grouping stream then.
19. according to each described method in the claim 14 to 18, wherein, described first sampling of extracting is identical with described second sampling of extracting.
20. according to each described method in the claim 14 to 19, wherein, described buffer is associated with an output channel, and each media packet streams is directed to identical output channel.
21. according to each described method in the claim 14 to 20, wherein, described method is further comprising the steps of: receive the 3rd media packet streams of the described sampling that comprises described media channel, and from described the 3rd media packet streams, extract sampling.
22. according to each described method in the claim 14 to 21, wherein, described method is further comprising the steps of: detect ruined sampling, and make these ruined samplings not be written in the described buffer.
23. according to each described method in the claim 14 to 22, wherein, all samplings that comprised in the media packet of described first media packet streams are not all to be comprised in any single medium grouping of described second media packet streams.
24. according to each described method in the claim 14 to 23, wherein, the sampling in the described media channel has related timestamp separately, and the step of the output time of the sampling of described definite described extraction is based on corresponding timestamp.
25. according to each described method in the claim 14 to 23, wherein, the step of described first media packet streams of described reception is first data-interface from the transmitter apparatus that is connected with described data network, and the step of described second media packet streams of described reception is described first data-interface or another data-interface from the transmitter apparatus that is connected with described data network.
26. according to each described method in the claim 14 to 25, wherein, described method comprises that also sending a message asks to receive described first media packet streams and described second media packet streams.
Carry out computer software 27. be used for operating receiver device according to each described method of claim 14 to 26.
28. be used for by the transmitter apparatus of data network to receiver device transmission media packet streams, described transmitter apparatus comprises:
One or more data-interfaces are used for sending first media packet streams and second media packet streams to described receiver device, and described Media Stream comprises one or more media channels;
Processor carries out packetizing based on the request from described receiver device to described media channel, is used for the media packet streams that sends by described data-interface with establishment; And
Controller makes described processor create two independently media packet streams, described two independently media packet streams comprise the identical media passage that will be sent to described receiver device.
29. data network comprises:
Transmitter apparatus according to claim 28;
According to each described receiver device in the claim 1 to 13; And
Communicator is used to make media packet streams to be sent to described receiver device from described transmitter apparatus.
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| AU2006902741 | 2006-05-17 | ||
| AU2006902741A AU2006902741A0 (en) | 2006-05-17 | Transmitting and Receiving Media Packet Streams | |
| AU2006906015A AU2006906015A0 (en) | 2006-10-19 | Transmitting and Receiving Media Packet Streams | |
| AU2006906015 | 2006-10-19 | ||
| PCT/AU2007/000667 WO2007131296A1 (en) | 2006-05-17 | 2007-05-17 | Redundant media packet streams |
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| CN101563886A true CN101563886A (en) | 2009-10-21 |
| CN101563886B CN101563886B (en) | 2012-12-05 |
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| CN200780026677.0A Active CN101563886B (en) | 2006-05-17 | 2007-05-17 | Redundant media packet streams |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108073478A (en) * | 2016-11-13 | 2018-05-25 | 哈曼国际工业有限公司 | The network audio that multi-mode can configure |
| US10165331B2 (en) | 2013-11-05 | 2018-12-25 | Industrial Technology Research Institute | Method and device operable to store video and audio data |
| CN114270735A (en) * | 2019-08-23 | 2022-04-01 | 北欧半导体公司 | Radio device for transmitting digital audio streams |
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| WO2013122387A1 (en) | 2012-02-15 | 2013-08-22 | Samsung Electronics Co., Ltd. | Data transmitting apparatus, data receiving apparatus, data transceiving system, data transmitting method, and data receiving method |
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| WO2013122385A1 (en) | 2012-02-15 | 2013-08-22 | Samsung Electronics Co., Ltd. | Data transmitting apparatus, data receiving apparatus, data transreceiving system, data transmitting method, data receiving method and data transreceiving method |
| KR102047800B1 (en) * | 2012-02-15 | 2019-11-22 | 삼성전자주식회사 | Data transmitting apparatus, data receiving apparatus, data transreceiving system, data transmitting method, data receiving method and data transreceiving method |
| CN103108136B (en) * | 2013-03-05 | 2016-09-28 | 广东威创视讯科技股份有限公司 | A kind of video cross method and master control set |
| US9438193B2 (en) * | 2013-06-05 | 2016-09-06 | Sonos, Inc. | Satellite volume control |
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| US10560514B2 (en) | 2014-03-29 | 2020-02-11 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting and receiving information related to multimedia data in a hybrid network and structure thereof |
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| CN1189726A (en) * | 1997-01-17 | 1998-08-05 | 德尔科电子公司 | High speed multimedia data network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10165331B2 (en) | 2013-11-05 | 2018-12-25 | Industrial Technology Research Institute | Method and device operable to store video and audio data |
| CN108073478A (en) * | 2016-11-13 | 2018-05-25 | 哈曼国际工业有限公司 | The network audio that multi-mode can configure |
| CN108073478B (en) * | 2016-11-13 | 2023-10-13 | 哈曼国际工业有限公司 | Multi-mode configurable network audio device, method and medium |
| CN114270735A (en) * | 2019-08-23 | 2022-04-01 | 北欧半导体公司 | Radio device for transmitting digital audio streams |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101563886B (en) | 2012-12-05 |
| CN101491002A (en) | 2009-07-22 |
| CN101491002B (en) | 2013-10-30 |
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