The development of new technologies has confronted the entire domain of science and industry with issues of big data's scalability as well as its integration with the purpose of forecasting analytics in its life cycle. In predictive analytics, the forecast of near-future and recent past - or in other words, the now-casting - is the continuous study of real-time events and constantly updated whe...

We discuss necessary and sufficient conditions for an auto-encoder to define a conservative vector field, in which case it is associated with an energy function akin to the unnormalized log-probability of the data. We show that the conditions for conservativeness are more general than for encoder and decoder weights to be the same (“tied weights”), and that they also depend on the form of the h...

Due to their high computational demand, MPEG-2 video coding solutions have been based mainly on custom hardware (ASIC) systems. Such systems lack the flexibility and adaptability of software-based solutions. Achieving real-time MPEG-2 video encoding in software remains to be a major challenge. A typical MPEG-2 encoder performs 20 to 30 GOPS (Giga operations per second), which exceeds the capabi...

We consider the interference channel in which messages sent at one encoder are known to the other encoder, but not vice versa. Such channel model allows for unidirectional node cooperation: the encoder that knows both messages can exploit that information to improve the achievable rates. We derive conditions under which the capacity region of this channel coincides with the capacity region of t...

There is presented implementation of hybrid DCT/DPCM video-encoder in the powerful TI’s media processor TMS320DM642 embed in evaluation module DM642 EVM. Code Composer Studio 3 is used as working space. Videoencoder is implemented with use of C code so it is easily understandable. The easiness is very important because the implemented video-encoder will be used for educational purposes. The str...

This paper presents the design of an optimized Compressive Sensing image compression technique for data transmission over noisy mobile wireless channel. The proposed technique is more robust to channel noise. It uses individual measurement driven coding scheme, which facilitates simpler encoder design. The shift of computational burden from encoder to decoder is more suitable for mobile devices...

Exploiting thread-level parallelism is a promising way to improve the performance of multimedia applications running on multithreading general-purpose processors. This paper describes our work in developing the first multithreading implementation of the H.264 encoder. We parallelize the encoder using the OpenMP programming model, which allows us to leverage the advanced compiler technology in t...

Video codec LSIs: Various single-chip MPEG-2 MP@ML encoder LSIs have been developed [Mizuno et al., 1997]. Most of these were designed for similar targets such as DVD video recorders. These do not need peripherals except for two 16-Mbit SDRAMs and they offer a wider search range than older encoder chip-sets [Ogura et al., 1998]. One has a good feature in that it can create a single-board HDTV e...

—An algorithm for finding the starting state of a feedback tailbiting encoder is proposed, based solely on the properties of the encoder state diagram. With this approach, conditions for the existence of a tailbiting code generated by such an encoder are naturally tested in the process of preparing a certain permutation table for the starting state determination algorithm. A tailbiting failure ...

In this paper, we introduce a video encoder control scheme for MPEG-1, which maintains the quality of the encoded video at a constant level. This scheme is based on a quantitative video quality measure, and it uses a feedback control mechanism to adjust the parameters of the encoder. We evaluate this scheme by applying it to several types of video sequences, and comparing it with the Constant B...