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Chinese digitalization process of television hasn't achieved anticipated goals as yet. No new value-added services for consumers, dissymmetrical development between service patterns and operation patterns, and the enormous input cost, are the dominant factors. To address these issues, a new Dual-Mode Transmission Networks for DTV (DMTN) is proposed in this study, in which the primary TV network is superimposed by a complementary framework based on Broad-Storage TV (BSTV). The necessity of congregating hot TV resources is discussed via analyzing the scale-free properties in DMTN. At the same time, the Self-organized Parallel Broadcasting Technology (SPBT) and Uniform Content Locator (UCL) are studied in DMTN to utilize availably transmission channels and to help consumers to communicate with each other expediently. Experiment is designed and conducted, including system structure, functionality description, experiment parameters, and experiment results. Experimental results show that DMTN can provide not only traditional TV services on schedule, but also digital interactive TV services on demand using a single channel DMTN is able to meet many individual consumers needs for video information, change the operation pattern of Broadcast and Television industry, and become an effective approach to advance the national informatization in low cost. (1) Index Terms--Interactive Television, DTV, UCL, Scale-free Properties

In this paper the authors describe a clock synchronization system with buffer management mechanism that enables 'TV adoptable quality' of HD (High Definition) video transmission via wireless network. Like DLNA (Digital Living Network Alliance), the usage of IP based network for CE devices, especially for Audio Video appliance, is increasing its importance. Compared with IT technology based devices such as a PC, consumers expect CE devices to provide more stable functions and higher quality. CE devices are expected to provide Audio Visual contents including HD video contents with the quality better than that can be achieved with Internet streaming on a PC. . Based on well considered simulation for wireless network usage at home, we have developed the buffering system with its optimized size that can offer high quality lid video transmission service to CE oriented customers. Index Terms--Wireless Networking, Quality of Service, Audio Visual Data Transmission, Clock Synchronization

In this paper, we propose a pulse ordered time hopping multiple access (PO-THMA) ultra- wideband (UWB) system using modified Hermite polynomial (MHP) pulses. The MHP pulses have a mutually orthogonal property between different ordered pulses and that property makes simultaneous transmission at the same time slot without collision in the THMA UWB system, and this result in increasing transmission capacity or improving bit error rate (BER). We analyze BER of the proposed system and show that the BER performance and the transmission capacity are improved dramatically when compared with those of conventional THMA UWB system. Index Terms--UWB, PO-THMA, MHP pulses, WPAN

In this paper, we present a single-chip receiver for DVB data broadcasting system, which is designed using the methodology of hardware and software co-design. The hardware part filters out and descrambles the necessary MPEG-2 Transport Stream (TS) packets, then sends them to PC. Some useful peripheral functions such as PCI interface, [I.sup.2]C bus controller and smart card 7816 interface are also developed to provide a cost-effective solution. Meanwhile, multi-protocol decapsulation related to data broadcasting protocol is analyzed and implemented mainly by software. In order to improve the throughput and hardware utilization, we adopt chaining mode direct memory access (DMA) scheme and a double buffer approach both in hardware and in software. Moreover, the parameters of chaining mode DMA and the depth of buffer are further optimized by theoretical analysis. The result indicates the throughput of chaining mode DMA is up to 475.8 Mb/s, which is 24 times as much as non-chaining mode DMA strategy. Index Terms--Data broadcasting, transport stream, MPE, DMA, PCI.

Scalable encoding scheme enables the player or streaming server to adaptively change the playback rate of multimedia content. However, in scalable streaming of layer encoded content, sequential playback of content does not necessarily coincide with the sequential scan of a file. This property introduces another dimension of complexity in the scheduling of data block retrieval. In this work, we develop a novel file organization strategy, Harmonic Interleaving, which can effectively handle the dynamically changing playback rate of multimedia data retrieval. The proposed scheme not only eliminates the retrieval of unnecessary blocks but also minimizes disk head movement. Via experiment, Harmonic Interleaving exhibits superior disk utilization on a moderately loaded network. Index Terms--Scalable Streaming, Multimedia File System, Multimedia Data Transmission

The IEEE1394 is a favorable protocol for A/V networks recently in a home. The IEC61883 is a standard protocol which defines the communication and control interface for IEEE1394 A/V devices. However, common user in a home can not understand their internal operations because the IEEE1394 and IEC61883 are very complex protocols. The more nodes participate in the IEEE1394 network, the more problems of resource exhaustion and connection repetition may occur. So this paper proposes a middleware for an isochronous connection management and a reliable multimedia data transmission in the IEEE1394-IEC61883 based multimedia home networks. In this paper, the proposed middleware supports the various types of isochronous connection and guarantees the reliability of isochronous connection as defining the convenient interface for controlling and monitoring A/V devices. In addition, the proposed middleware provides the characteristic of a real-time data transmission. We used CORBA API for multimedia service between A/V devices. The proposed architecture was implemented and verified using a test-bed. Index Terms--Home Network, IEC61883, IEEE1394, Isochronous connection, Middleware

In this paper, we proposed a platform based bus-interleaved architecture for the de-blocking filter in H.264. Specifically, to efficiently use the bus bandwidth, we classify the filtering mode into 8 types and use an adaptive transmission scheme to avoid redundant data transfer. Moreover, to reduce the processing latency, we use a bus-interleaved architecture for conducting data transmission and filtering in parallel As compared to the state-of-the-art designs, our scheme offers 1.6x to 7x performance improvement. While clocking at 100MHz, our design can support 2560x1280@30Hz processing throughput. The proposed design is suitable for low cost and real-time applications. Moreover, it can be easily applied in system-on-chip design. Index Terms--H.264 de-blocking filter, loop filter, AVC.

As portable wireless computers become popular, mechanisms to transmit data to such users are of significant interest. Data broadcast is effective in dissemination-based applications to transfer the data to a large number of users in the asymmetric environment where the downstream communication capacity is relatively much greater than the upstream communication capacity. Index based organization of data transmitted over wireless channels is very important to reduce power consumption. In this paper, we consider an efficient (l:m) indexing scheme for data broadcast on unreliable wireless networks. We model the data broadcast mechanism on the error prone wireless networks, using Marcov model. We analyze the average access time to obtain the desired data item and find that the optimal index redundancy (m) is SQRT[Data/{Index*(1p)^K}], where p is the failure rate of wireless link, Data is the size of data in a broadcast cycle, Index is the size of index, and K is the index level. We also measure the performance of data broadcast schemes by parametric analysis.

This paper describes a compact system for transmitting data packets multiplexer with digital audio and NTSC TV signals using optical fibers. In this system, up to 18 channels are allocated for data packets transmitted at a maximum speed of 1.764 Mbps. Digital audio signals are inserted into the horizontal sync period of the NTSC TV signal. In addition to data packets transmission, the digital NTSC TV signal transmission system is used to easily distribute many types of information classified into categories for customers who wish to contract an information center. The proposed system is characterized by the followings: Firstly, this system could give a satisfactory picture quality enough to operate it together with the video equipment even though the quality of the reproduced pictures is lower than that of the normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00 x fsc with a quantizing level of 8 bits. Secondly, NTSC TV picture codes, audio codes, and data packets can satisfactorily be transmitted using inexpensive devices at a transmission rate of as low as 50 Mbps. Thirdly, this system is used for transmitting data packets and audio signal codes which are inserted in the horizontal sync period of the digital NTSC TV signal. Both data packets and audio signal codes can be distributed to the specific receivers specified by device address. A combination of edge-emitting LED's (ELED's) and optical fibers enable the transmission system to easily transmit a digital NTSC TV picture signal together with data packets and digital audio codes((1)(2)). A new approach of combining ELED's and optical fibers to distribute CATV pictures and electronic information via the ISDN is also proposed.

This paper introduces a very high rate data acquisition device, which can always anticipate element development. Its principle is described. The block diagram, circuits of key parts and operating sequence are given. Calculation formula are derived.

This paper presents the first performance evaluation of the PL CEBUS with acknowledgment. Three different cases, namely, 600, 300 and 100 bit packet sizes, have been considered. The evaluation has included simulation experiments measuring message and packet delays, message throughput, and channel throughput. Acknowledged network CEBus service has been confirmed to perform well in terms of delays and message throughputs when compared to unacknowledged service over the practical range of normalized offered load. However, at high loads, substantial performance differences occur. Overall, as should be expected, the acknowledged PL CEBUS provides a more reliable service, but at the expense of somewhat increased delays and reduced throughputs when compared with the unacknowledged PL CEBUS. Detailed comparisons between acknowledged and unacknowledged networks will be presented and discussed.

This paper describes an optical fiber transmission system with a bandwidth of greater than 100 MHz to transmit multi-channel FM audio and video signals through an optical fiber. The differential gain (DG) and differential phase (DP) were less than 2% and 3 degrees, respectively, and the SNR was 56 dB.

The purpose of this paper is to design a flexible and efficient architecture called Priority based Cable Network (PBCN) architecture for realtime multimedia transmission with QoS guarantees over multi-channel CATV and ATM network. We dedicate to let the traffic types bwtween CATV and ATM network which can cooperate well. As we know, both the 'upstream' and 'downstream' are shared media, and the data collision can occur without any flow control. We found that the efficient way to avoid the collision is under the control of MAC (Medium Access Control) layer protocol. It is the reason why we will introduce our Enhanced Priority based Non-Blocking Ternary Tree Splitting Algorithm, which is based on the IEEE 802.14 working group, to improve the efficiency of contention process and to decrease the chance of collision in the upstream. This paper proposes a Connection Admission and Flow Control (CAFC) server including a QoS negotiation component and a Priority based Flow Control (PBFC) module. We also distinguish the data streams with different priorities across different channels by the CAFC server. Finally, we give some attractive simulation results to show the efficient performance of the network architecture which is proposed in this paper. Keywords: PBCN, QoS, CATV, ATM, upstream, downstream, MAC, Enhanced Priority based Non-Blocking Ternary Tree Splitting Algorithm, CAFC, PBFC.

Existing in-home telephone wire can be used to create a 10Base-T (10 Mbps Ethernet) customer premises network (CPN) that may be used to connect consumer electronic devices to a hub or to a residential gateway (RG). This paper presents measurements of attenuation and crosstalk performance at 10Base-T frequencies made on four different types of in-home telephone cables, including quad and twisted-pair. Computer simulations use the measured response of the cables to determine the performance of 10Base-T transmitted over them. Simulations are verified by experimental transmission tests using a LAN analyzer. It is found that some of the in-home telephone cables have good performance, which actually exceeds that of the Category 3 wiring specified for 10Base-T use. Some of the cables are not so good and do not even come close to meeting Category 3 specifications. Even so, 10Base-T was able to transmit error-free over 100 meters (328 ft) of the worst cable tested here with no bridged taps. Tree-and-branch wiring has unterminated branches connected to the cable between the transmitter and receiver. These branches are called bridged taps. It was found that 10Base-T can function with bridged taps shorter than about 8 ft, but bridged taps longer than about 12 ft generally cause 10Base-T to fail.