FMUSER Wirless Transmit Video And Audio More Easier !

[email protected] WhatsApp +8618078869184
Language

    IPTV system VOD and TV performance test

     

    At present, many equipment manufacturers have provided IPTV system platform and equipment, and the industry recognized that IPTV business includes two basic services: VOD and TV live broadcast. The development of IPTV in China is in full swing, and the test of IPTV system is in urgent need of standardization. This paper intends to conduct a simple discussion on the performance test of these two basic services of IPTV system. This article only considers end-to-end performance testing, which looks at the user side and does not consider the server-side hierarchical cache performance.

     

    Due to the difference in network structure between VOD network and TV live broadcast network, VOD distribution needs to rely on CDN network, while TV distribution needs to rely on multicast network and does not need CDN network to cache, based on this, the two kinds of service performance test focus is also different.


    1. A brief introduction to VOD service performance testing

     

    VOD programs are usually delivered on demand. VOD users can freely control the progress of the program and terminate the broadcast of the program, but each VOD user needs to occupy a certain amount of network bandwidth, so the number of concurrent users is limited by the network bandwidth and server performance. The main test indexes of VOD service performance include the maximum number of concurrent streams, bandwidth fluctuation, average bandwidth used, packet loss rate and average response time.

     

    Maximum number of concurrent streams: The maximum number of online users that a streaming system can support at the same time, with the requirement that each user can normally watch the full video program. Before the number of users has gradually increased to a maximum, the system will not make the already online users unable to access the service because of the addition of new users. Some video systems can provide a large number of concurrent streams, but the number of failures is large. Since most users use TCP, the number of concurrent streams does not decrease after retransmission. However, for the original failed single stream, the user cannot continue to get the video service. Therefore, the maximum number of concurrent streams should be the maximum number of users that the video system can support to effectively watch programs online at the same time.
    Bandwidth fluctuation: During the playing of video files, the bandwidth of media stream will change due to the change of the picture. For example, for classroom teaching programs, the continuous picture changes little before and after, so the program code rate is relatively constant, and the bandwidth fluctuation is relatively small. For sports programs, continuous pictures change greatly before and after the show, so the program code rate changes correspondently, and the bandwidth fluctuates accordingly.
    The fluctuation of program code rate is a severe test to the throughput of the video server. If too many users demand programs with higher code rate, the number of users that the server can support is likely to decrease, or the video server will reduce the output bandwidth of the program stream.


    Average bandwidth used: the average of the bandwidth used by all users during the process of watching a program. The greater the value, the stronger the bandwidth capacity provided by the streaming video system.

     

    Packet loss rate: When users accept VOD service, they need to obtain video files from the server, and whether packet loss occurs in the process of video file transmission. The value of packet loss rate is generally relatively small, but it has a very important impact on users. Especially, the compression ratio used at present is relatively high. Even the loss of a few video packets will affect users' viewing and even break the connection phenomenon. The maximum end-to-end packet loss rate for VOD should not exceed 0.1%.

     

    Average response time: the overall distribution of the time between a user making a VOD request and receiving a video service.
    Of course, the shorter the average response time, the better. In general, the average end-to-end VOD delay should not exceed 2s (tentative).

     

     

    2. Brief introduction to TV service performance test

     

    TV programs are usually transmitted by multicast. Multicast is a network technology that allows one or more senders (multicast sources) to simultaneously send a single packet to multiple receivers at once. A multicast source sends a packet to a specific multicast group, and only addresses belonging to that multicast group can receive the packet. In IPTV, there is often only one multicast source, and even if the number of users grows exponentially, the backbone bandwidth does not need to increase, because no matter how many target addresses there are, only a single video stream is transmitted over any backbone link of the entire network, which is called "send once, broadcast within a group". Multicast improves the efficiency of data transmission and reduces the possibility of congestion in the backbone. For the TV system, the number of users it can support is only limited by the ability to access the network, which has nothing to do with the push capacity of the front-end push system. Therefore, the main test indicators of TV service performance include the maximum number of channels pushed, average channel bandwidth, average channel switching time, average channel departure delay, average channel joining delay, channel overlap time and channel interval time.

     

    Maximum number of channels pushed: The maximum number of channels that a streaming system can provide, allowing users to traversal all channels in a short period of time.

     

    Average channel bandwidth: The amount of bandwidth used by a program on each channel.
    Standard definition (SDTV) and high-definition (HDTV) programs occupy different bandwidth, HDTV programs occupy much more bandwidth than SDTV programs.

     

    Average channel switching time: The time between sending the IGMPLEAVE message and receiving the first multicast packet for the requested channel. Because the channel switching of TV programs on IP network can only be realized through IGMP, compared with the traditional TV channel switching is much faster. Therefore, according to personal subjective feeling, usually IPTV channel switching time should not exceed 2S (tentative), otherwise the user can hardly bear the waiting time of channel switching.
    At present, the slow switching time of IPTV channel is also an urgent problem to be solved.

     

    Average channel departure delay: The time between sending an IGMPLEAVE message and receiving the last multicast packet for that channel. In general, the shorter the channel departure delay, the better.

     

    Average channel join delay: The time between the IGMPJOIN message being sent and the first multicast packet for the channel being received. In general, the shorter the channel add delay, the better.


    Channel overlap time: if the system channel switch takes the mode of receiving the requested channel's multicast packet before the original channel's multicast packet is stopped, the channel overlap time refers to the time interval between receiving the first multicast packet of the requested channel and receiving the last multicast packet of the original channel.

     

    Channel interval time: if the system channel switch takes the way of stopping the original channel's multicast packet before receiving the requested channel's multicast packet, the channel interval time refers to the time interval between receiving the last multicast packet of the original channel and receiving the first multicast packet of the requested channel.

     

     

    3. other considerations

     

    In addition to the performance test metrics discussed above, there are practical factors that need to be considered and tested.

     

    Stability of the system. Since most of the tasks of IPTV video system are to provide entertainment programs, users pay more attention to the integrity and consistency of the programs when watching entertainment programs. Therefore, stability is a very key point for the video system. Users will have a strong emotional color when watching their favorite video programs, and any interruption of the stream will greatly affect the appreciation effect of users. For example, when users watch TV dramas, the screen will be black. The stability of IPTV video system includes: stable maximum number of concurrent streams/programs, stable program bandwidth and long time working stability.

     

    Network damage factors. Various kinds of damage in the network have a great impact on the quality of video programs. The occasional damage in the network directly affects users' psychological acceptance of the video programs. The most direct impact is the reduction of users' subjective evaluation on the quality of video images. VOD programs may show significant Mosaic, discoloration, and lag, in which case the user is likely to terminate the VOD program. Therefore, we should carefully study the damage caused by various kinds of network damage (including delay, jitter, packet loss, out of order, line error code) to the quality of video programs. The impact of network damage on QoS of IPTV service should be taken into full consideration when the relevant technical indicators of IPTV service are formulated.

     

     

    4. Conclusion

    In recent years, with the high-speed development of the broadband, video streaming service has become one of the major applications of the Internet, IPTV system is to provide video service of one of the major, at present, operators have begun to gradually provide IPTV business, IPTV trials network has been in trial operation of the domestic cities. It is a key step for operators to test IPTV system service performance before launching IPTV service.

     

     

     

     

     

     

    How far(long) the transmitter cover?

    The transmission range depends on many factors. The true distance is based on the antenna installing height , antenna gain, using environment like building and other obstructions , sensitivity of the receiver, antenna of the receiver . Installing antenna more high and using in the countryside , the distance will much more far.

    EXAMPLE 5W FM Transmitter use in the city and hometown:

    I have a USA customer use 5W fm transmitter with GP antenna in his hometown ,and he test it with a car, it cover 10km(6.21mile).

    I test the 5W fm transmitter with GP antenna in my hometown ,it cover about 2km(1.24mile).

    I test the 5W fm transmitter with GP antenna in Guangzhou city ,it cover about only 300meter(984ft).

    Below are the approximate range of different power FM Transmitters. ( The range is diameter )

    0.1W ~ 5W FM Transmitter :100M ~1KM

    5W ~15W FM Ttransmitter : 1KM ~ 3KM

    15W ~ 80W FM Transmitter : 3KM ~10KM

    80W ~500W FM Transmitter : 10KM ~30KM

    500W ~1000W FM Transmitter : 30KM ~ 50KM

    1KW ~ 2KW FM Transmitter : 50KM ~100KM

    2KW ~5KW FM Transmitter : 100KM ~150KM

    5KW ~10KW FM Transmitter : 150KM ~200KM

    How to contact us for the transmitter?

    Call me +8618078869184 OR
    Email me [email protected]
    1.How far you want to cover in diameter ?
    2.How tall of you tower ?
    3.Where are you from ?
    And we will give you more professional advice.

    About Us

    FMUSER.ORG is a system integration company focusing on RF wireless transmission / studio video audio equipment / streaming and data processing .We are providing everything from advice and consultancy through rack integration to installation, commissioning and training.
     
    We offer FM Transmitter, Analog TV Transmitter, Digital TV transmitter, VHF UHF Transmitter, Antennas, Coaxial Cable Connectors, STL, On Air Processing, Broadcast Products for the Studio, RF Signal Monitoring, RDS Encoders, Audio Processors and Remote Site Control Units, IPTV Products, Video / Audio Encoder / Decoder, designed to meet the needs of both large international broadcast networks and small private stations alike.
     
    Our solution has FM Radio Station / Analog TV Station / Digital TV Station / Audio Video Studio Equipment / Studio Transmitter Link / Transmitter Telemetry System / Hotel TV System / IPTV Live Broadcasting / Streaming Live Broadcast / Video Conference / CATV Broadcasting system.
     
    We are using advanced technology products for all the systems, because we know the high reliability and high performance are so important for the system and solution . At the same time we also have to make sure our products system with a very reasonable price.
     
    We have customers of public and commercial broadcasters, telecom operators and regulation authorities , and we also offer solution and products to many hundreds of smaller, local and community broadcasters .
     
    FMUSER.ORG has been exporting more than 15 years and have clients all over the world. With 13 years experience in this field ,we have a professional team to solve customer's all kinds of problems. We dedicated in supplying the extremely reasonable pricing of professional products & services.
    Contact email : [email protected]

    Our Factory

    We have modernization of the factory . You are welcome to visit our factory when you come to China.

    At present , there are already 1095 customers around the world visited our Guangzhou Tianhe office . If you come to China , you are welcome to visit us .

    At Fair

    This is our participation in 2012 Global Sources Hong Kong Electronics Fair . Customers from all over the world finally have a chance to get together.

    Where is Fmuser ?

    You can search this numbers " 23.127460034623816,113.33224654197693 " in google map , then you can find our fmuser office .

    FMUSER Guangzhou office is in Tianhe District which is the center of the Canton . Very near to the Canton Fair , guangzhou railway station, xiaobei road and dashatou , only need 10 minutes if take TAXI . Welcome friends around the world to visit and negotiate .

    Contact: Sky Blue
    Cellphone: +8618078869184
    WhatsApp: +8618078869184
    Wechat: +8618078869184
    E-mail: [email protected]
    QQ: 727926717
    Skype: sky198710021
    Address: No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China Zip:510620

    English: We accept all payments , such as PayPal, Credit Card, Western Union, Alipay, Money Bookers, T/T, LC, DP, DA, OA, Payoneer, If you have any question , please contact me [email protected] or WhatsApp +8618078869184

    • PayPal.  www.paypal.com

      We recommend you use Paypal to buy our items ,The Paypal is a secure way to buy on internet .

      Every of our item list page bottom on top have a paypal logo to pay.

      Credit Card.If you do not have paypal,but you have credit card,you also can click the Yellow PayPal button to pay with your credit card.

      ---------------------------------------------------------------------

      But if you have not a credit card and not have a paypal account or difficult to got a paypal accout ,You can use the following:

      Western Union.  www.westernunion.com

       

      Pay by Western Union to me :

      First name/Given name: Yingfeng
      Last name/Surname/ Family name: Zhang
      Full name: Yingfeng Zhang
      Country: China
      City: Guangzhou 

      ---------------------------------------------------------------------

      T/T .  Pay by T/T (wire transfer/ Telegraphic Transfer/ Bank Transfer)
       
      First BANK INFORMATION (COMPANY ACCOUNT):
      SWIFT BIC: BKCHHKHHXXX
      Bank name: BANK OF CHINA (HONG KONG) LIMITED, HONG KONG
      Bank Address: BANK OF CHINA TOWER, 1 GARDEN ROAD, CENTRAL, HONG KONG
      BANK CODE: 012
      Account Name : FMUSER INTERNATIONAL GROUP LIMITED
      Account NO. : 012-676-2-007855-0
      ---------------------------------------------------------------------
      Second BANK INFORMATION (COMPANY ACCOUNT):
      Beneficiary: Fmuser International Group Inc
      Account Number: 44050158090900000337
      Beneficiary's Bank: China Construction Bank Guangdong Branch
      SWIFT Code: PCBCCNBJGDX
      Address: NO.553 Tianhe Road, Guangzhou, Guangdong,Tianhe District, China
      **Note: When you transfer money to our bank account, please DO NOT write anything in the remark area, otherwise we won't be able to receive the payment due to government policy on international trade business.

    * It will be sent in 1-2 working days when payment clear.

    * We will send it to your paypal address. If you want to change address, please send your correct address and phone number to my email [email protected]

    * If the packages is below 2kg,we will be shipped via post airmail, it will take about 15-25days to your hand.

    If the package is more than 2kg,we will ship via EMS , DHL , UPS, Fedex fast express delivery,it will take about 7~15days to your hand.

    If the package more than 100kg , we will send via DHL or air freight. It will take about 3~7days to your hand.

    All the packages are form China guangzhou.

    * Package will be sent as a "gift" and declear as less as possible,buyer don't need to pay for "TAX".

    * After ship, we will send you an E-mail and give you the tracking number.

    For Warranty .
    Contact US--->>Return the item to us--->>Receive and send another replace .

    Name: Liu xiaoxia
    Address: 305Fang HuiLanGe HuangPuDaDaoXi 273Hao TianHeQu Guangzhou China.
    ZIP:510620
    Phone: +8618078869184

    Please return to this address and write your paypal address,name,problem on note:

    List all Question

    Nickname

    Email

    Questions

      Enter email  to get a surprise

      fmuser.org

      es.fmuser.org
      it.fmuser.org
      fr.fmuser.org
      de.fmuser.org
      af.fmuser.org ->Afrikaans
      sq.fmuser.org ->Albanian
      ar.fmuser.org ->Arabic
      hy.fmuser.org ->Armenian
      az.fmuser.org ->Azerbaijani
      eu.fmuser.org ->Basque
      be.fmuser.org ->Belarusian
      bg.fmuser.org ->Bulgarian
      ca.fmuser.org ->Catalan
      zh-CN.fmuser.org ->Chinese (Simplified)
      zh-TW.fmuser.org ->Chinese (Traditional)
      hr.fmuser.org ->Croatian
      cs.fmuser.org ->Czech
      da.fmuser.org ->Danish
      nl.fmuser.org ->Dutch
      et.fmuser.org ->Estonian
      tl.fmuser.org ->Filipino
      fi.fmuser.org ->Finnish
      fr.fmuser.org ->French
      gl.fmuser.org ->Galician
      ka.fmuser.org ->Georgian
      de.fmuser.org ->German
      el.fmuser.org ->Greek
      ht.fmuser.org ->Haitian Creole
      iw.fmuser.org ->Hebrew
      hi.fmuser.org ->Hindi
      hu.fmuser.org ->Hungarian
      is.fmuser.org ->Icelandic
      id.fmuser.org ->Indonesian
      ga.fmuser.org ->Irish
      it.fmuser.org ->Italian
      ja.fmuser.org ->Japanese
      ko.fmuser.org ->Korean
      lv.fmuser.org ->Latvian
      lt.fmuser.org ->Lithuanian
      mk.fmuser.org ->Macedonian
      ms.fmuser.org ->Malay
      mt.fmuser.org ->Maltese
      no.fmuser.org ->Norwegian
      fa.fmuser.org ->Persian
      pl.fmuser.org ->Polish
      pt.fmuser.org ->Portuguese
      ro.fmuser.org ->Romanian
      ru.fmuser.org ->Russian
      sr.fmuser.org ->Serbian
      sk.fmuser.org ->Slovak
      sl.fmuser.org ->Slovenian
      es.fmuser.org ->Spanish
      sw.fmuser.org ->Swahili
      sv.fmuser.org ->Swedish
      th.fmuser.org ->Thai
      tr.fmuser.org ->Turkish
      uk.fmuser.org ->Ukrainian
      ur.fmuser.org ->Urdu
      vi.fmuser.org ->Vietnamese
      cy.fmuser.org ->Welsh
      yi.fmuser.org ->Yiddish

       
  •  

    FMUSER Wirless Transmit Video And Audio More Easier !

  • Contact

    Address:
    No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China 510620

    E-mail:
    [email protected]

    Tel / WhatApps:
    +8618078869184

  • Categories

  • Newsletter

    FIRST OR FULL NAME

    E-mail

  • paypal solution  Western UnionBank OF China
    E-mail:[email protected]   WhatsApp:+8618078869184   Skype:sky198710021 Chat with me
    Copyright 2006-2020 Powered By www.fmuser.org

    Contact Us