1. Introduction Direct broadcast satellite is a crucial component of China's innovative industry layout. It focuses on the latest advancements in satellite communication technology, microelectronics, computer science, and numerous other fields, significantly expanding the reach of China’s radio and television services while enhancing their service capabilities. This initiative promotes improvements in satellite design and manufacturing, program transmission, and secure broadcasting technologies, driving the growth of associated product manufacturing and service industries as well as fostering industrial upgrades. It is anticipated to create a market worth hundreds of billions, ultimately contributing to GDP growth. Currently, there is substantial demand for live broadcast satellites in China. Hangzhou Guoxin has received approval from the State Administration of Radio, Film, and Television to develop ABS-S demodulation chips. To shorten the development cycle for manufacturers and reduce the bill of materials (BOM) for the entire system, GX1121 (an ABS-S solution) and GX3001 (an MPEG2 decoder chip) were introduced to offer a comprehensive solution for live satellite set-top boxes. 2. Overview of ABS-S Set-Top Box Functions: The GX1121 + GX3001 solution-based ABS-S set-top box is a digital satellite receiver compliant with the software and hardware specifications of China’s Broadband Broadcasting Satellite “Village Communication†program. This receiver demodulates signals according to the China Advanced Broadcasting System (ABS-S) standard. The solution offers two video outputs, one S-VIDEO output, and a stereo audio output, meeting the diverse audio and video output needs of various users. Below are additional details regarding the set-top box functionality: 3. Design of DVB-C Set-Top Boxes Based on GX1121 and GX3001 3.1 System Hardware Design The following primarily outlines our design approach for the system's channels and sources. Figure 1 illustrates the system application block diagram of our solution: Figure 5 Software Architecture Diagram Description of Each Module: PSI/SIengine: In the application software, program searches and EPG information require detailed data from each table in PSI and SI. Additionally, some data in the tables must be obtained or monitored in real time by software, necessitating a structured method for filtering and parsing these tables. PSI/SIengine effectively organizes the monitoring, filtering, and analysis of PSI/SI tables, enhancing the real-time functionality of software and improving the readability of the code. UI System: Builds a set-top box interface development platform, offering a wide range of controls and advanced features to boost interface development efficiency. NODE: Manages set-top box data storage, minimizing flash fragmentation and ensuring efficient storage and rapid data retrieval. Search: Constructs the receiving mechanism of related tables on the PSI/SI engine to perform program searches, sort, and save data for the set-top box. Program searches include single-frequency and automatic searches. EPG: Establishes the receiving mechanism of related tables on the PSI/SI engine. When demultiplexing does not filter EPG data, the EPG module remains in a sleep state. Upon detecting data, the EPG module efficiently parses the stored data, enabling real-time updates of new data and deletion of expired data without wasting system resources. Book: Implements the reserved program feature, automatically switching to the user's reserved program at the appointed time. Time: Provides two functionalities: one is to supply system time to the set-top box, and the other is to offer a timer function for the aforementioned applications and other modules in the same layer. AV: Primarily handles operations on audio and video, including playing programs, channel settings and readings, volume adjustments and readings, volume level settings and readings, and TV broadcast system readings and settings. Dbase: Calls NODE to store, read, delete, modify, and increase the data of the set-top box. Information Service: Filters, organizes, parses XML data, and processes information service interface menus. 4. Conclusion Currently, many STB manufacturers in China have adopted the GX1121 + GX3001 solution to pass the live broadcast star certification tests conducted by Radio and TV authorities. The overall performance of the program and the company's close support have earned unanimous recognition from domestic STB manufacturers. Due to increasingly fierce market competition, STB manufacturers feel mounting pressure to bring products to market faster, necessitating chip suppliers to provide more comprehensive and efficient technical support. Thus, the level of technical support offered by chip suppliers has become a critical consideration for selecting STB vendors. In the past, foreign chip manufacturers often relied on domestic agents to provide technical support, but this model has struggled to meet the dual demands of complete machine manufacturers for differentiated designs and time-to-market. As a local company, Hangzhou Guoxin boasts unique advantages in technical support. Besides offering a full suite of GX1121 and GX3001 development kits (including samples, evaluation boards, application manuals, evaluation software, and standard C language drivers), its on-site support team, comprising chip designers, provides comprehensive technical assistance—from differentiated design and on-site debugging to software integration and mass production testing—ensuring customers can achieve mass production in the shortest possible timeframe. In summary, facing promising opportunities and intense competition, STB manufacturers need to adopt more flexible technical strategies to address various new design challenges. The complete solution for live satellite set-top boxes based on GX1121 and GX3001 is your ideal choice. References: GX1121 datasheet, Hangzhou National Chip Science & Technology Co., Ltd; GX3001 datasheet, Hangzhou Nationalchip Science & Technology Co., Ltd; [3] Deng Yugui et al., Digital Set-Top Box Principles, Applications, and Maintenance, People's Posts and Telecommunications Press; [4] Chinese People's Broadcasting and Television Standard GB/T233-2008; [5] John G. Proakis, Modern Communication Systems, Electronics Industry Press; The Projector metal hanger is flexible and suitable for various models. Projector Mount,Projector Stand,Projector Holder,Projector Screen Holder Jiangsu D-Bees Smart Home Co., Ltd. , https://www.cI-hometheater.com