Cauchy-Density-Based Basic Unit Layer Rate Controller for H.264/AVC

Sergio Sanz-Rodríguez, Óscar del-Ama-Esteban, Manuel de-Frutos-Lopez, Fernando Díaz-de-Maria
2010 IEEE transactions on circuits and systems for video technology (Print)  
Cauchy-density-based basic unit layer rate controller for H.264/AVC Article, Postprint version This version is available at http://dx.doi.org/10.14279/depositonce-5747. Suggested Citation Sanz-Rodríguez, S.; del-Ama-Este an, Ó.; de-Frutos-López, M.; Díaz-de-María, F.: Cauchy-density-ased a sic unit layer rate controller for H.264/AVC. -In: IEEE transactions on circuits and systems for videot echnology : a pu lication of the Circuits and Systems Society. Abstract-The rate control problem has
more » ... extensively studied in parallel to the development of the different video coding standards. The bit allocation via Cauchy-density-based ratedistortion (R-D) modeling of the discrete cosine transform (DCT) coefficients has proved to be one of the most accurate solution at picture level. Nevertheless, in some specific applications operating in real-time low-delay environments, a basic unit (BU) layer is recommended in order to provide a good trade-off between picture quality and delay control. In this paper, a novel BU bit allocation for H.264/AVC is proposed based on a simplified Cauchy probability density function (PDF) source modeling. The experimental results are twofold: 1) the proposed rate control algorithm (RCA) achieves an average PSNR improvement of 0.28 dB respect to a well known BU layer RCA, while maintaining a similar buffer occupancy evolution; and 2) It achieves to notably reduce the buffer occupancy fluctuations respect to a well known picture layer RCA, while maintaining similar quality levels.
doi:10.1109/tcsvt.2010.2051369 fatcat:45n4drxiizbtlbg5tdlqgs6zt4