DSP-based transcoding of digital video signals with MPEG-2 format

Author

Sostawa, Bernd ; Dannemann, Thomas ; Speidel, Joachim

Author_Institution

Inst. of Telecommun., Stuttgart Univ., Germany

Volume

46

Issue

2

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

358

Lastpage

362

Abstract

MPEG-2 video coding is widely used in broadcasting and increasingly in studio applications. For reasons of limited storage and/or transmission capacity, it may be necessary to reduce the bit rate of MPEG-2 video bitstreams. We present an implementation of a frequency domain transcoder (FDTC) on a media processor which reduces the bit rate of an incoming video bitstream in real time. The FDTC has a low complexity and low memory requirements. A rate control with low delay provides a bitstream with constant bit rate (CBR) at the output, independent whether the input bit rate is variable (VBR) or constant (CBR). The FDTC achieves a better or same peak signal-to-noise ratio (PSNR) than a bulky cascade of a complete MPEG-2 video decoder and encoder

Keywords

code standards; delays; discrete cosine transforms; telecommunication control; telecommunication standards; transform coding; video coding; CBR; DCT coefficients; DSP-based transcoding; MPEG-2 format; MPEG-2 video bitstreams; MPEG-2 video coding; MPEG-2 video decoder; MPEG-2 video encoder; PSNR; bit rate reduction; broadcasting; constant bit rate; digital video signals; frequency domain transcoder; low complexity; low delay; low memory requirements; media processor; peak signal-to-noise ratio; rate control; storage capacity; studio applications; transmission capacity; variable bit rate; Bit rate; Costs; DVD; Decoding; Digital multimedia broadcasting; Digital video broadcasting; Drives; Frequency domain analysis; Transcoding; Video on demand;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.846670

Filename

846670