JP2003052021A5

JP2003052021A5 -

Info

Publication number: JP2003052021A5
Application number: JP2002156229A
Authority: JP
Filing date: 2002-05-29
Publication date: 2005-04-07

Description

【００３２】
【課題を解決するための手段】
そこで、上記課題を解決するために本発明は、以下の再生方法を提供するものである。
（１） MPEG符号化方式で符号化された画像データである第１及び第２の２つのMPEG画像データを、それぞれのMPEG画像データにおける指定された繋ぎ指定位置で、前記第１のMPEG画像データから前記第２のMPEG画像データへ繋げて再生を行う繋ぎ再生ステップを設けたMPEGデータ再生方法であって、
前記繋ぎ再生ステップは、
前記第１のMPEG画像データを要素符号化データとして含んでMPEG方式によりパケット多重化して生成された第１のMPEG多重化データから前記第１のMPEG画像データを得、前記第２のMPEG画像データを要素符号化データとして含んで前記MPEG方式によりパケット多重化して生成された第２のMPEG多重化データから前記第２のMPEG画像データを得ると共に、繋ぎ再生させるためのデータである繋ぎ区間再符号化データを要素符号化データとして含んで前記MPEG方式でパケット多重化して生成された繋ぎ区間MPEG多重化データから前記繋ぎ区間再符号化データを得て、
前記第１のMPEG画像データにおいて設定された所定の繋ぎ区間の開始位置まで前記第１のMPEG画像データを再生した後、前記繋ぎ区間再符号化データを前記繋ぎ区間の開始位置から終了位置まで再生し、その後、前記第２のMPEG画像データにおける前記繋ぎ指定位置から前記第２のMPEG画像データを再生する繋ぎ再生ステップであり、
前記繋ぎ区間再符号化データは、前記第１のMPEG画像データにおける前記繋ぎ指定位置から所定時間分前の位置を開始位置とし、前記第１のMPEG画像データにおける前記繋ぎ指定位置を終了位置とする区間を前記繋ぎ区間として、前記繋ぎ区間の前記第１のMPEG画像データを復号して得た画像データである第１の繋ぎ区間復号画像データを、前記MPEG符号化方式で再符号化して生成された再符号化データであって、
前記繋ぎ区間再符号化データは、前記再符号化時におけるVBVバッファ占有値に関する情報値の推移が、前記繋ぎ区間の開始位置に対応する位置における前記第１のMPEG画像データの符号化時のVBVバッファ占有値に関する情報値から開始されて、前記繋ぎ指定位置に対応する位置における前記第２のMPEG画像データの符号化時のVBVバッファ占有値に関する情報値までで終了するように符号量制御が行われて再符号化されたものである、
ことを特徴とするMPEGデータ再生方法。
[0032]
[Means for Solving the Problems]
Then, in order to solve the above-mentioned subject, the present invention provides the following reproduction methods.
(1) The first and second MPEG image data, which are image data encoded by the MPEG encoding method, are designated at the designated joint position in each of the MPEG image data, the first MPEG image data An MPEG data reproducing method comprising a connecting reproducing step of connecting the second MPEG image data and reproducing the data;
The connection regeneration step is
The first MPEG image data is obtained from the first MPEG multiplexed data generated by packet multiplexing according to the MPEG method including the first MPEG image data as element encoded data, and the second MPEG image data To obtain the second MPEG image data from the second MPEG multiplexed data generated by packet multiplexing according to the MPEG method, as well as element encoded data; The link section re-encoded data from the link section MPEG multiplexed data generated by packet multiplexing according to the MPEG method including encoded data as element encoded data;
After playing the first MPEG picture data to the start position of the first MPEG picture data Oite set, predetermined connecting section, the end position of the connecting section re-encoded data from the start position of the connecting section And a second reproduction step of reproducing the second MPEG image data from the specified connection position in the second MPEG image data.
The joint section re-encoded data has a start position at a position a predetermined time before the joint designation position in the first MPEG image data as a start position and a joint designation position in the first MPEG image data as an end position. The first connection section decoded image data, which is image data obtained by decoding the first MPEG image data of the connection section with the section as the connection section , is generated by re-encoding with the MPEG encoding method. Re-encoded data, and
The connection section re-encoded data is the VBV at the time of encoding of the first MPEG image data at a position corresponding to the start position of the connection section , with respect to the transition of the information value related to the VBV buffer occupancy value at the time of the re-encoding. Starting from the information value regarding buffer occupancy value, the code amount control is performed so as to end up to the information value regarding VBV buffer occupancy value at the time of encoding of the second MPEG image data at the position corresponding to the specified connection position. those which are re-encoded cracks,
A method of reproducing MPEG data characterized by

Claims

From the first MPEG image data, the first and second two MPEG image data, which are image data encoded according to the MPEG encoding method, are designated from the first MPEG image data at the designated connection designated position in each of the MPEG image data. An MPEG data reproducing method comprising a connecting reproduction step of connecting to 2 MPEG image data for reproduction.
The connection regeneration step is
The first MPEG image data is obtained from the first MPEG multiplexed data generated by packet multiplexing according to the MPEG method including the first MPEG image data as element encoded data , and the second MPEG image data To obtain the second MPEG image data from the second MPEG multiplexed data generated by packet multiplexing according to the MPEG method, as well as element encoded data; The link section re-encoded data from the link section MPEG multiplexed data generated by packet multiplexing according to the MPEG method including encoded data as element encoded data ;
After playing the first MPEG picture data to the start position of the first MPEG picture data Oite set, predetermined connecting section, the end position of the connecting section re-encoded data from the start position of the connecting section And a second reproduction step of reproducing the second MPEG image data from the specified connection position in the second MPEG image data.
The joint section re-encoded data has a start position at a position a predetermined time before the joint designation position in the first MPEG image data as a start position and a joint designation position in the first MPEG image data as an end position. The first connection section decoded image data, which is image data obtained by decoding the first MPEG image data of the connection section with the section as the connection section , is generated by re-encoding with the MPEG encoding method. Re-encoded data, and
The connection section re-encoded data is the VBV at the time of encoding of the first MPEG image data at a position corresponding to the start position of the connection section , with respect to the transition of the information value related to the VBV buffer occupancy value at the time of the re-encoding. Starting from the information value regarding buffer occupancy value, the code amount control is performed so as to end up to the information value regarding VBV buffer occupancy value at the time of encoding of the second MPEG image data at the position corresponding to the specified connection position. those which are re-encoded cracks,
A method of reproducing MPEG data characterized by