Browse Prior Art Database

A VERY LOW COST METHOD TO CREATE EXTRA CAPACITY IN AN H.623 VIDEO BITSTREAM

IP.com Disclosure Number: IPCOM000009733D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-13

Publishing Venue

Motorola

Related People

Paola Hobson: AUTHOR [+2]

Abstract

This method aims to provide a very low cost means to transmit additional data while using readi- ly available H.263 hardware and/or software. Such data might be video enhancement information, text/graphics overlay. The method would be used in any situation where additional data was required e.g. for adding a graphics overlay with H.263 encoded video.

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Technical MOTOROLA @ Developments

A VERY LOW COST METHOD TO CREATE EXTRA CAPACITY IN

AN H.623 VIDEO BITSTREAM

by Paola Hobson and Timor Kadir

ABSTRACT

  This method aims to provide a very low cost means to transmit additional data while using readi- ly available H.263 hardware and/or software. Such data might be video enhancement information, text/graphics overlay. The method would be used in any situation where additional data was required e.g. for adding a graphics overlay with H.263 encoded video.

INTRODUCTION

This paper deals with advances in the field of
H.263 video processing. Low bit rate video com- pression using the H.263 [l] standard has been pro- posed for video telephone and potentially wireless video applications. In fixed rate transmission chan- nels such as in TETRA, the video system perfor- mance is limited by both the available bandwidth and the H.263 method. Bit rates of less than 32 kbps are typical.

PROBLEMS TO BE SOLVED

  Where H.263 has been chosen as a video com- pression method, if additional dam is required by a user for any type of video enhancement, graphics overlay, audio signal, or any other additional signal, there is no means to accommodate it when a fixed rate transmission channel is in use. It is undesirable

to code the video at an even lower rate to accommo- date additional data because the image quality may already be on the limit of acceptability.

PROPOSED SOLUTION TO THE PROBLEMS

Introduction

  The solution aims to provide a very low cost means to transmit additional data (e.g. video enhancement information, text/graphics overlay etc.) while using readily available H.263 hardware and/or software. No modifications to H.263 hard- ware or software are proposed as it is assumed that the user of this method would have designed equip- ment around a standard H.263 chip or H.263 exe- cutable code implemented on a suitable platform.

  The system would be used in any situation where additional data was required. An example might be in a surveillance application, where it is required to transmit additional detail within a region of interest (ROI), Figure 1. A second example might be where a graphics overlay is required around the ROI, Figure 2. To add such an overlay and process it as part of the video input signal to the
H.263 coder would considerably degrade the overall video picture quality, because computer generated graphics are high frequency objects which absorb a large percentage of the available data rate.

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Region where more detail is required

Fig. 1 Example where user might wish to enhance an area of a picture (ROI).

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Circular overlay

* graphics and straight

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c im~verlay

Fig. 2 Example where diff...