Integrated broadcast platform enables resource reuse of broadcast platform
As new media businesses are in full swing in China and around the world, the communication systems for Internet TV and mobile TV are becoming more and more abundant. As a broadcaster with both IPTV and mobile TV operating qualifications, China Radio International has built an efficient and integrated broadcast platform, and it has become an optimized, fast and secure new media service for telecom operators. An important issue it faces.
This article refers to the address: http://
Content source synchronization is difficult
Internet TV and mobile TV are the main methods of current new media operations, and they are also the most abundant modes of communication. However, since IPTV and mobile TV are aimed at different networks and terminals, there are differences in the way content is produced, encoded, and transmitted. This kind of differentiation brings the difficulty of integrated operation for the broadcast subject. From the digital production and storage to the broadcast process, the requirements faced by two different operating systems make the whole process difficult to integrate. Often, both processes are performed separately in the actual process. How to synchronize the content source of IPTV to the operating system of mobile TV has become an important topic in the operation field of a full-service new media broadcaster. If it can be solved well, it will enable broadcast of Internet-oriented video operations. The source is shared by mobile TV, achieving the effect of resource reuse and integration.
When the Internet TV is broadcast, the operation process includes media asset scheduling, auditing, uploading to the broadcast source, encoding output, encryption scrambling, and delivery to the customer. The overall broadcast process of Internet TV generally has four unified elements: First, the storage format is unified. In order to easily manage the content of the media asset system, to be easily re-encoded, and to be compatible with mainstream broadcast devices, the video storage format is generally MPEG-2 (MP: ML) which is commonly used in international digital television and digital movie broadcasting. Second, the broadcast format is uniform. Depending on the receiving network and the terminal of the broadcast system, the encoder is generally set up after the broadcast system, so that the media stream can be encoded into the actual low-stream format, and H.264, WMV or REAL is usually used. Third, the upper limit code stream is unified. Due to the limitation of network bandwidth, regardless of the CBR or VBR mode, the upper limit of the code stream will select the appropriate value, generally 240kbps, 384kbps, 400kbps or 512kbps, etc., and the content will be saved after transcoding in the media format. . Fourth, the resolution is uniform. Since the broadcast terminal of the network television is a computer monitor or a set top box connected by an STB, the resolution requirement is as high as possible under the limitation of the code stream, thereby achieving a better viewing effect, and the general network television standard definition system is 720. ×480, 720×576, etc.
Mobile TV broadcast platform requires special
Unlike IPTV, mobile TV has more complexity in the broadcast system due to the limitations of its broadcast network and the diversity of mobile terminals. It mainly reflects the following four difficulties: First, the network characteristics are complex. In addition to 2.5G and 3G networks, there are also new DMB (DAB) and CMMB multicast mobile networks. These networks have very different bandwidth characteristics and communication principles, and thus the operational forms required for mobile TV content are also Reflects a certain degree of complexity. Second, the terminal operating system is diverse. The OS system used in mobile broadcast terminals includes a variety of systems, and various systems differ in supported specifications and encoding formats. Third, the multimedia format is different. Different terminals have different multimedia format requirements, including 3GPP, MPEG-4, H.264, WindowMedia, and RealMedia. Fourth, the resolution is different. The resolution of the terminal is severely differentiated, and the system of 160×120, 320×240 or even 640×480 is everywhere, which has become a demanding requirement for the mobile TV to broadcast source.
Integrated broadcast platform to solve difficulties
In order to meet the broadcast requirements of mobile TV, and to be able to reuse the broadcast system of network TV, the key points must be broken through the following key links: First, the process before the broadcast source audit is consistent. In order to reduce duplication of work, the work before the broadcast system auditing process should be consistent, so as to avoid the efficiency reduction caused by multiple audits of the content. Second, the broadcasting control system should be consistent. Mobile TV should reuse the broadcast source of network TV, so that the broadcast system should be shared in the broadcast control, so as to achieve consistent video content output. Third, the coding link implements code stream and resolution adaptation. The key part is in the coding part. In this part, parallel to the encoding process of the network TV, the encoding process of the mobile TV must be synchronized to generate a new data stream adapted to the code stream and resolution of different terminals. Separation. Fourth, the division of different data streams. According to different requirements, the processed data stream should be preprocessed according to different communication networks, including link layer coding, packing, modulation, etc., and then enter different operating networks.
This all-in-one solution can efficiently solve the problem of resource reuse of broadcast platform, and can realize the ability to consistently broadcast a variety of new media operating systems. The solution and the unified operation of the mobile TV composite operation process can maximize the reuse of broadcast material resources, and can lower the cooperation threshold with telecom operators, and cooperate for the operation of the broadcast organization and the operation network provider. Provides a viable basis.
Rectangular Green Through-Hole LED(DIP LED) manufacturer from China.
Square Through-hole IR LED , we supply 2*3*4mm Square Green LED with water clear lens, 2*5*5mm Square Green LED with diffused lens, 2*5*7mm Square Green LED with Green clear lens and Square Green LED with Green diffused lens. Square through-hole LED's angle is 140 degrees.
In this catalog, we mainly introduce the Square Green Through-hole LED.
Square Green Through-Hole LED widely used for Green sign, display LED, indicator LED, die hole LED and Square round Green with lamp holder because of the high brightness, wide visual angle and the square size.
For the pin of Square Green Through-Hole Led, we also have a lots of choice on it. For example: Square Green Through-hole LED flat pin, Square Green Through-hole LED curved pin, Square Green Through-hole LED braided pin ect.
For the bringhtness of Square Green through-hole LED, we have three level: common bright Square Green through-hole LED, super bright Square Green through-hole LED and ultra bright Square Green through-hole LED.
For the raw materials, we use the LED chip from Taiwan Epistar, Tyntek, Optotech. The stability of our products have been recognized by all of our custom.
All of our product are meet with Reach, CE, RoSH, SGS, EN62471 standards and have 5 years warranty.
Rectangular Green Through-Hole LED
Shenzhen Best LED Opto-electronic Co.,Ltd , https://www.bestsmd.com