JP7133069B2 - レイヤードディビジョンマルチプレキシングを利用した放送信号フレーム生成装置および放送信号フレーム生成方法 - Google Patents
レイヤードディビジョンマルチプレキシングを利用した放送信号フレーム生成装置および放送信号フレーム生成方法 Download PDFInfo
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Description
この時、放送信号フレーム生成装置111は、タイムインターリービングされた信号を用いて、ブートストラップおよびプリアンブルが含まれた放送信号フレームを生成することができる。この時、放送信号フレームは、ATSC3.0フレームであるとよい。
level)だけパワー減少したエンハンストレイヤ信号が結合されてマルチプレキシングされた信号が生成された場合、マルチプレキシングされた信号のパワーレベルが、コアレイヤ信号やエンハンストレイヤ信号のパワーレベルより高いことが分かる。
Layer Pipes;PLPs)のタイプ情報およびサイズ情報をシグナリングするためのプリアンブルが含まれた放送信号フレームを生成する(S1270)。
-タイプ1のPLP
共通PLPが存在する場合、共通PLP後に送信される
フレーム内で1つのバースト(burst)形態(one slice)で送信される
-タイプ2のPLP
タイプ1のPLPが存在する場合、タイプ1のPLP後に送信される
フレーム内で2つ以上のサブスライス(sub-slice)形態に分散して送信される
サブスライスの個数が増加するにつれてタイムダイバーシティ(time diversity)が増加し、パワー消耗(power consumption)の効果を有する
この時、タイプ1のPLPは、分散しない(nun-dispersed)PLPに相応でき、タイプ2のPLPは、分散した(dispersed)PLPに相応できる。この時、分散しないPLPは、連続的なデータセルインデックス(contiguous data cell indices)に割り当てられる。この時、分散したPLPは、2つ以上のサブスライスに分けられて割り当てられる。
SUB_SLICES_PER_FRAME (15 bits)
NUM_PLP (8 bits)
NUM_AUX (4 bits)
AUX_CONFIG_RFU (8 bits)
for i=0.. NUM_RF-1 {
RF_IDX (3 bits)
FREQUENCY (32 bits)
}
IF S2=='xxx1' {
FEF_TYPE (4 bits)
FEF_LENGTH (22 bits)
FEF_INTERVAL (8 bits)
}
for i=0 .. NUM_PLP-1 {
NUM_LAYER (2~3 bits)
for j=0 .. NUM_LAYER-1{
/ * Signaling for each layer */
PLP_ID (i,j) (8 bits)
PLP_GROUP_ID (8 bits)
PLP_TYPE (3 bits)
PLP_PAYLOAD_TYPE (5 bits)
PLP_COD (4 bits)
PLP_MOD (3 bits)
PLP_SSD (1 bit)
PLP_FEC_TYPE (2 bits)
PLP_NUM_BLOCKS_MAX (10 bits)
IN_BAND_A_FLAG (1 bit)
IN_BAND_B_FLAG (1 bit)
PLP_MODE (2 bits)
STATIC_PADDING_FLAG (1 bit)
IF (j > 0)
LL_INJECTION_LEVEL (3~8 bits)
} / * End of NUM_LAYER loop */
/ * Common signaling for all layers */
FF_FLAG (1 bit)
FIRST_RF_IDX (3 bits)
FIRST_FRAME_IDX (8 bits)
FRAME_INTERVAL (8 bits)
TIME_IL_LENGTH (8 bits)
TIME_IL_TYPE (1 bit)
RESERVED_1 (11 bits)
STATIC_FLAG (1 bit)
PLP_START (24 bits)
PLP_SIZE (24 bits)
} / * End of NUM_PLP loop */
FEF_LENGTH_MSB (2 bits)
RESERVED_2 (30 bits)
for i=0 .. NUM_AUX-1 {
AUX_STREAM_TYPE (4 bits)
AUX_PRIVATE_CONF (28 bits)
}
Claims (3)
- コアレイヤ信号およびエンハンストレイヤ信号を、互いに異なるパワーレベルで結合して、マルチプレキシングされた信号を生成するように構成された結合器と、
前記コアレイヤ信号に相応するコアレイヤと、前記エンハンストレイヤ信号に相応するエンハンストレイヤにともに適用されるインターリービングを行い、タイムインターリービングされた信号を生成するように構成されたタイムインターリーバと、
フィジカルレイヤパイプ(Physical Layer Pipes;PLPs)のサイズ情報および、インジェクションレベル情報をシグナリングするためのシグナリングフィールドを含む放送信号フレームを生成するように構成されたフレームビルダとを含み、
前記サイズ情報は、レイヤ識別情報と予め設定された値とを比較した結果の判断なく、前記フィジカルレイヤパイプ(PLP)のそれぞれに対して含まれ、前記レイヤ識別情報は、前記コアレイヤ及び前記エンハンストレイヤのいずれか1つを識別するものであり、
前記インジェクションレベル情報は、前記レイヤ識別情報と前記予め設定された値とを比較した結果に応じて選択的に含まれ、
前記サイズ情報は、前記フィジカルレイヤパイプに割り当てられたデータセルの個数に基づいて生成されることを特徴とする放送信号フレーム生成装置。 - 前記フレームビルダは、
ブートストラップを生成するように構成されたブートストラップ生成部と、
L1シグナリング区分を生成するように構成されたL1シグナリング区分生成部と、
データペイロードを生成するように構成されたデータペイロード生成部とを含むことを特徴とする請求項1に記載の放送信号フレーム生成装置。 - 前記シグナリングフィールドは、
前記フィジカルレイヤパイプ(PLP)を識別するためのPLP識別情報と、
前記レイヤ識別情報とを含むことを特徴とする請求項1に記載の放送信号フレーム生成装置。
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JP2022134498A JP2022169716A (ja) | 2015-04-20 | 2022-08-25 | レイヤードディビジョンマルチプレキシングを利用した放送信号フレーム生成装置および放送信号フレーム生成方法 |
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