Transcoder equipment

Abstract

Abstract Translated from Japanese (57)【要約】 【課題】符号化信号のビットレートを任意に変更でき、 かつこのビットレートの変更により生じる入力時と再符 号化時との時間のずれを最小限に抑え、画質の劣化等の 防止を図る。 【解決手段】ビデオＥＳ信号に対し、ＶＬＣ一部削除部 １０３にて可変長符号の一部を削除し、この削除された 信号を再符号化部１０４にて任意のビットレートで再度 符号化信号に復元するようにし、さらに、ＰＣＲ抽出処 理部１０７にてＴＳ信号に含まれるＰＣＲ信号を抽出 し、このＰＣＲ信号の内容を上記ＶＬＣ一部削除部１０ ３及び再符号化部１０４によるビデオＥＳ信号の符号削 除処理及び復元処理に伴いビット系列が増減した内容に 書き替えて、多重化部１０５にてビデオＥＳ信号及びオ ーディオＥＳ信号に多重してＴＳ信号を生成するように している。 (57) [Summary] [Problem] The bit rate of an encoded signal can be arbitrarily changed. In addition, the time lag between the time of input and the time of re-encoding caused by the change of the bit rate is minimized, and the deterioration of image quality is prevented. A video ES signal is partially deleted by a VLC partial deletion section (103), and the deleted signal is re-encoded at an arbitrary bit rate by a re-encoding section (104). In addition, the PCR signal included in the TS signal is extracted by the PCR extraction processing unit 107, and the contents of this PCR signal are extracted by the VLC partial deletion unit 10 described above. 3 and rewrite the content of the bit sequence increased or decreased in accordance with the code deletion process and the restoration process of the video ES signal by the re-encoding unit 104, and multiplex the video ES signal and the audio ES signal by the multiplexing unit 105 to the TS signal. Is generated.

Inventors

• 👤 Kazuo Ozeki
• 👤 和夫 大関
• 👤 Nobuyuki Sasaki
• 👤 信之 佐々木

Bibliographic Details