Patent · US Active

Digital transcoding system

US7936816B2 · kind B2 · utility

2Cited by

17References

16Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Bernd Sostawa · Herrenberg, DE
Thomas Dannemann · Holzgerlingen, DE

Key dates

Filing date	Sep 11, 2006
Grant date	May 3, 2011
Priority date	—
Expiry date	Jan 27, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/61
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A digital transcoder system is presented for receiving data bit streams with a first bit rate (R1) and outputting a data bit stream with a second bit rate (R2) which differs from the first bit rate (R1), and in particular is reduced relative thereto. This transcoder system has a decoder device (10) on its input side and a coder device (20) on its output side, the latter consisting of a series circuit of a quantizer (21) for requantizing the data dequantized in the decoder device (10), with a requantization factor (Q2), also with a subsequent VLC coder (22) and an output buffer (23). Establishing the second bit rate (R2) requires that the requantization factor of the quantizer (21) be changed, with reference to macro-blocks, according to the specification of a certain calculational formula.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.