Spectral Band Replication - definizione. Che cos'è Spectral Band Replication
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Cosa (chi) è Spectral Band Replication - definizione

LOW BITRATE DIGITAL AUDIO ENHANCEMENT TECHNIQUE
Spectral Band Replication

Spectral Band Replication         
<audio, compression> (SBR) Guessing the nontransmitted higher frequency range of a compressed audio file by some helper bits (transmiited with the stream) and the transmitted base band. SBR allows a restoration (not reconstruction) of the upper frequency range without lots of bits. It was developed by Coding Technology (http://codingtechnology.com/), and is useful for medium and high quality coding at low and medium data rates. It is used by Digital Radio Mondiale and {MP3 Pro}. (2004-12-10)
Spectral band replication         
Spectral band replication (SBR) is a technology to enhance audio or speech codecs, especially at low bit rates and is based on harmonic redundancy in the frequency domain.
DNA replication         
  • trimer]] of the protein [[PCNA]].
  • Overview of the steps in DNA replication
  • The cell cycle of eukaryotic cells.
  • element]] and the detailed structures of two [[base pair]]s are shown in the bottom right.
  •  isbn = 978-1-4051-0379-4 }}</ref> If a mismatch is accidentally incorporated, the polymerase is inhibited from further extension. Proofreading removes the mismatched nucleotide and extension continues.
  • E. coli Replisome. Notably, the DNA on lagging strand forms a loop. The exact structure of replisome is not well understood.
  • Epigenetic consequences of nucleosome reassembly defects at stalled replication forks
  • Formation of pre-replication complex.
  • Many enzymes are involved in the DNA replication fork.
  • Role of initiators for initiation of DNA replication.
  • Dam methylates adenine of GATC sites after replication.
  • Scheme of the replication fork.<br />a: template, b: leading strand, c: lagging strand, d: replication fork, e: primer, f: [[Okazaki fragments]]
  • Replication fork restarts by homologous recombination following replication stress
  • Steps in DNA synthesis
CELLULAR METABOLIC PROCESS IN WHICH A CELL DUPLICATES ONE OR MORE MOLECULES OF DNA
Lagging strand; Leading strand; Replication fork; Dna replication; Amplification of DNA; Leading and lagging strand; Termination of DNA replication; DNA Replication; Semi-conservative DNA replication; Cellular replication; Replication bubble; Replicating molecule; DNA replication protein; Template replication; Leading chain; Replication eye; Replication Fork; Lagging chain; Dna Replication; Discontinuous DNA replication; DNA amplification technology; Dioxyribonucleic acid replication; Replication origin regions; Initiation of DNA replication; Gene replication; DNA partition
In molecular biology, DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. why we have to study DNA replication?

Wikipedia

Spectral band replication

Spectral band replication (SBR) is a technology to enhance audio or speech codecs, especially at low bit rates and is based on harmonic redundancy in the frequency domain.

It can be combined with any audio compression codec: the codec itself transmits the lower and midfrequencies of the spectrum, while SBR replicates higher frequency content by transposing up harmonics from the lower and midfrequencies at the decoder. Some guidance information for reconstruction of the high-frequency spectral envelope is transmitted as side information.

When needed, it also reconstructs or adaptively mixes in noise-like information in selected frequency bands in order to faithfully replicate signals that originally contained no or fewer tonal components.

The SBR idea is based on the principle that the psychoacoustic part of the human brain tends to analyse higher frequencies with less accuracy; thus harmonic phenomena associated with the spectral band replication process needs only be accurate in a perceptual sense and not technically or mathematically exact.