US 2006/0039461 A1 · Video coding method

Abstract

In a coding method and coding system to generate a compressed data stream (CAV) with a variable bit rate from digital audio and/or video signals, with a prescribed limitation on the overall bit quantity/rate of the data stream, the signals are written to segments (s1, s2) of a temporary buffer (3) and analyzed as to the complexity of the signals in an analysis means (4). With the complexity information (C-INF) thereby obtained, the audio and/or video signals read from the temporary buffer (3) segment by segment are converted in a compression means (5) into the compressed data stream (CAV) with a variable bit rate, wherein the bit rate of the generated data stream is distributed within the segment as a function of the complexity information and of a segment-overall-bit-quantity provided for the segment in question. The data stream (CAV) may be stored in a memory means (6) or transmitted via a data transmission means (7).

Claims16

Dependent claims

A coding method of generating a compressed data stream with variable bit rate from digital audio and/or video signals (DIG-AV) or from audio and/or video signals (P-AV) digitized from analog signals (AN-AV), wherein the overall bit quantity/rate of the data stream does not exceed a prescribed limit, characterized in that:

the audio and/or video signals (P-AV) are put into intermediate storage in a temporary buffer (3),
the audio and/or video signals are analyzed in respect of the complexity of the signal waveform in order to obtain complexity information (C-INF),
the audio and/or video signals put into intermediate storage in the temporary buffer (3) are divided into individual segments (s1, s2 . . . si),
the audio and/or video signals (P-AV) are read, segment by segment, from the temporary buffer (3) and, with the complexity information (C-INF) assigned to them, are subjected to a compression method for signal compression which ultimately delivers a data stream (CAV) with a variable bit rate, wherein the bit rate is distributed within the segment as a function of the complexity information and of a segment-overall-bit-quantity provided for the segment in question, and
the data stream is stored in a memory means (6) or transmitted via a data transmission device (7).

2 more elements

A coding system for generating a compressed data stream with variable bit rate from digital audio and/or video signals (DIG-AV) or from analog (AN-AV) audio and/or video signals digitized by an analog/digital converter, wherein the overall bit quantity/rate of the data stream does not exceed a prescribed limit, characterized by:

a temporary buffer (3) to which the audio and/or video signals (P-AV) can be written,
an analysis means (4) for analyzing the audio and/or video signals in respect of the complexity of their waveforms, wherein complexity information (C-INF) can be generated,
a control means (8) for dividing the audio and/or video signals stored in the temporary buffer (3) into individual segments (s1, s2 . . . si),
a compression means (5) for converting the audio and/or video signals into a compressed data stream (CAV) with a variable bit rate, wherein the audio and/or video signals can be read, segment by segment, from the temporary buffer (3) and sent, with the complexity information (C-INF) assigned to them, to the compression means (5), wherein the compression means can be controlled in such a way that the bit rate of the generated data stream (CAV) is distributed within the segment as a function of the complexity information and of a segment-overall-bit-quantity provided for the segment in question, and
a memory means (6) or data transmission means (7) for storing or transmitting the data stream.

2 more elements

Dependencies are inferred from the claim text.

Video coding method

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Video coding method

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Abstract

Claims16