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- Emrah Akyol, Kumar Viswanatha, Kenneth Rose, Tor A. Ramstad
- IEEE Transactions on Information Theory
- 2014

This paper studies the zero-delay source-channel coding problem, and specifically the problem of obtaining the vector transformations that optimally map between the m-dimensional source space and k-dimensional channel space, under a given transmission power constraint and for the mean square error distortion. The functional properties of the cost are… (More)

- Kumar Viswanatha, Emrah Akyol, Kenneth Rose
- IEEE Transactions on Information Theory
- 2014

The two most prevalent notions of common information (CI) are due to Wyner and Gács-Körner and both the notions can be stated as two different characteristic points in the lossless Gray-Wyner region. Although the information theoretic characterizations for these two CI quantities can be easily evaluated for random variables with infinite… (More)

- Emrah Akyol, Kenneth Rose, Tor Ramstad
- 2010 IEEE Information Theory Workshop on…
- 2010

What is the optimal source-channel communication system for a given finite block length? The problem of obtaining the vector transformations that optimally map between the m-dimensional source space and the k-dimensional channel space is considered under a given channel power constraint and mean square error distortion measure. Closed form necessary… (More)

- Emrah Akyol, Kenneth Rose, Tor A. Ramstad
- 2010 Data Compression Conference
- 2010

This paper focuses on optimal analog mappings for zero-delay, distributed source-channel coding. The objective is to obtain the optimal vector trans- formations that map between m-dimensional source spaces and k-dimensional channel spaces, subject to a prescribed power constraint and assuming the mean square error distortion measure. Closed-form necessary… (More)

- Emrah Akyol, Mihaela van der Schaar
- IEEE Trans. Multimedia
- 2007

Significant power savings can be achieved on voltage/ frequency configurable platforms by dynamically adapting the frequency and voltage according to the workload (complexity). Video decoding is one of the most complex tasks performed on such systems due to its computationally demanding operations like inverse filtering, interpolation, motion compensation… (More)

- Emrah Akyol, A. Murat Tekalp, M. Reha Civanlar
- EURASIP J. Adv. Sig. Proc.
- 2007

Scalable video coders provide different scaling options, such as temporal, spatial, and SNR scalabilities, where rate reduction by discarding enhancement layers of different scalability-type results in different kinds and/or levels of visual distortion depend on the content and bitrate. This dependency between scalability type, video content, and bitrate is… (More)

- Kumar Viswanatha, Emrah Akyol, Kenneth Rose
- 2012 IEEE International Symposium on Information…
- 2012

The two most prevalent notions of common information are due to Wyner and Gács-Körner and both the notions can be stated as two different characteristic points in the lossless Gray-Wyner region. Although these quantities can be easily evaluated for random variables with infinite entropy (eg. continuous random variables), the operational… (More)

- Emrah Akyol, Debargha Mukherjee, Yuxin Liu
- 2007 IEEE International Conference on Image…
- 2007

A methodology for complexity scalable video encoding and complexity control within the framework of the H.264/AVC video encoder is presented. To yield good rate-distortion performance under strict complexity/time constraints for instance in real-time communication, a framework for optimal complexity allocation at the macroblock level is necessary. We… (More)

- Emrah Akyol, Kenneth Rose
- IEEE Transactions on Signal Processing
- 2012

Randomized (dithered) quantization is a method capable of achieving white reconstruction error independent of the source. Dithered quantizers have traditionally been considered within their natural setting of uniform quantization. In this paper we extend conventional dithered quantization to nonuniform quantization, via a subterfage: dithering is performed… (More)

- Emrah Akyol, Kenneth Rose, Tamer Basar
- CDC
- 2013

This paper considers the problem of optimal zerodelay jamming over an additive noise channel. Early work had already solved this problem for a Gaussian source and channel. Building on a sequence of recent results on conditions for linearity of optimal estimation, and of optimal mappings in source-channel coding, we derive the saddle-point solution to the… (More)