A Predictive H.263 Bit-Rate Control Scheme based on Scene Information
نویسندگان
چکیده
For many real-time visual communication applications such as video telephony, the transmission channel in used is typically constant bit rate (e.g. PSTN). Under this circumstance, the encoder’s output bit-rate must be regulated to meet the transmission bandwidth in order to guarantee a constant frame rate and delay. In this work, we propose a new predictive rate control scheme based on the activity of the scene to be coded for H.263 encoder
منابع مشابه
Real-time H.263+ Frame Rate Control Algorithm for Low Vbr Video
H.263+ is an emerging video compression standard for the low bit rate visual communication. Up to now, most H.263+ rate control algorithms, especially that in the test model of the near-term (TMN), focus on macroblock level bit allocation and low latency under a constant-frame-rate and constant-bit-rate (CBR) channel. As expected, these algorithms are not capable of handling the transmission ba...
متن کاملA frame-layer bit allocation for H.263+
In order to transmit pre-encoded digital video over heterogeneous networks, it is necessary to employ transcoding techniques that convert pre-encoded video streams into different bit rate and quality. The specified problem is referred to as rate shaping or rate adaptation. In this work, we propose a new frame layer bit allocation for H.263+ based video transcoding. In this scheme, scene context...
متن کاملReal-time motion-based H.263+ frame rate control
Most existing H.263+ rate control algorithms, e.g. the one adopted in the test model of the near-term (TMN8), focus on the macroblock layer rate control and low latency under the assumptions of with a constant frame rate and through a constant bit rate (CBR) channel. These algorithms do not accommodate the transmission bandwidth uctuation e ciently, and the resulting video quality can be degrad...
متن کاملReal-time encoding frame rate control for H.263+ video over the Internet
Most existing H.263+ rate control algorithms, e.g. the one adopted in the test model of the near-term (TMN8), focus on the macroblock layer rate control and low latency under the assumptions of with a constant frame rate and through a constant bit rate (CBR) channel. These algorithms do not accommodate the transmission bandwidth uctuation e ciently, and the resulting video quality can be degrad...
متن کاملHybrid Dct/wavelet I-frame Coding for Efficient H.263+ Rate Control at Low Bit Rates
At low bit rates, the bit budget for I-frame coding in H.263+ can be too high to be practical. A hybrid DCT/wavelet transform based I-frame coding is proposed in this work as a solution to the rate control problem. This new coder is compatible with the H.263+ bit stream syntax, and aims at an R-D optimized performance with a reasonable amount of computational complexity. By employing fast estim...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000