Rate control scheme for low-delay MPEG-2 video transcoder

Kasai, Hiroyuki; Hanamura, Tsuyoshi; Kamayama, W.; Tominaga, Hiroyuki

doi:10.1109/icip.2000.901121

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…The expression for P inc (N) and C p shown in Eqs. (5) and (6) in Section 4.1 is derived below. Let the set of requantization steps to be used in the MB code generation from the first to the (N -1)-th output streams be X M…”

Section: Appendixmentioning

confidence: 99%

“…In multicast distribution through video streaming on a network containing various mixed kinds of bandwidths, video information with various qualities must be provided according to the network bandwidth to which the receiving terminal is connected. In order to cope with such a requirement, video transcoders have been proposed which convert the bitrate (hereafter simply called rate) of the video stream according to the required bandwidth, in the router/gateway of the distribution server or the intermediate node [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Multiple bitrate output transcoder based on requantizer and reencoder sharing

Nagayoshi

Kasai

Hanamura

et al. 2004

Electron. Comm. Jpn. Pt. I

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SUMMARYThis paper proposes a video transcoder that realizes efficiently the function of multirate conversion to multiple bitrates. The multirate conversion function is realized as follows. The decoder and the inverse quantizer are shared as a single processor. The requantizer and the reencoder with the same requantization step are shared among outputs. With these provisions, an architecture is proposed whereby the processing complexity in multirate conversion can be reduced. The number of requantization processing operations per macro-block is examined theoretically, and it is shown that the conversion processing complexity can be formulated as a function of the output bitrate. Lastly, the theoretical evaluation and the evaluation experiment based on these investigations show that the sharing of the requantizer/reencoder is the scheme that reduces the increase of the processing complexity as a function of the number of outputs, and can cope with any number of outputs with two to four times the processing complexity of the single-rate output scheme.

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Section: Appendixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiple bitrate output transcoder based on requantizer and reencoder sharing

Nagayoshi

Kasai

Hanamura

et al. 2004

Electron. Comm. Jpn. Pt. I

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“…This transcoder processes during each fixed unit time that was adopted in conventional transcoders [2,6]. This processing unit is defined as bf_time.…”

Section: Multiprogram Ts Transcodermentioning

confidence: 99%

“…After the packets are output, the number of remaining packets and ρ are updated by Eq. (8). However, all of the ρ values do not have to be updated.…”

Section: Proposed Schemementioning

confidence: 99%

“…On the other hand, MPEG-2 TS should broadcast multiple channels, has a syntax compatible with multiple programs, and is assumed to use the multiprogram TS in a variety of video distribution services, such as digital broadcasting and CATV. Although some research on multiprogram TS-compatible transcoders has addressed bit rate control in video ES [8], there are still no reports on research about remultiplexing the output packets.…”

Section: Introductionmentioning

confidence: 99%

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Remultiplexing scheme for MPEG‐2 multiprogram transport stream transcoder

Takahashi

Hanamura²,

Kasai

et al. 2002

Electron. Comm. Jpn. Pt. I

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SUMMARYIn this paper, we propose an output packet remultiplexing scheme for an MPEG-2 multiprogram transport stream transcoder. The proposed scheme avoids STD buffer failure by dividing the packets into Program Specific Information (PSI), audio, and video and implementing remultiplexing. Specifically, PSI packets are multiplexed at a constant time interval, audio packets are multiplexed at the same times as the input times of the audio TS packets, and video packets are multiplexed so that the outputs of the video TS packets are at equal intervals. Finally, we clearly demonstrate through simulation experiments the ability to prevent STD buffer failure and the effectiveness of the proposed scheme.

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Rate control for video transmission over wireless LANs

Beek¹

2005

2005 Digest of Technical Papers. International Conference on Consumer Electronics, 2005. ICCE.

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Rate control scheme for low-delay MPEG-2 video transcoder

Cited by 10 publications

References 3 publications

Multiple bitrate output transcoder based on requantizer and reencoder sharing

Multiple bitrate output transcoder based on requantizer and reencoder sharing

Remultiplexing scheme for MPEG‐2 multiprogram transport stream transcoder

Rate control for video transmission over wireless LANs

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